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[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2013, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/osd/osd_handler.c
37  *
38  * Top-level entry points into osd module
39  *
40  * Author: Nikita Danilov <nikita@clusterfs.com>
41  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
42  */
43
44 #define DEBUG_SUBSYSTEM S_OSD
45
46 #include <linux/module.h>
47
48 /* LUSTRE_VERSION_CODE */
49 #include <lustre_ver.h>
50 /* prerequisite for linux/xattr.h */
51 #include <linux/types.h>
52 /* prerequisite for linux/xattr.h */
53 #include <linux/fs.h>
54 /* XATTR_{REPLACE,CREATE} */
55 #include <linux/xattr.h>
56
57 /*
58  * struct OBD_{ALLOC,FREE}*()
59  * OBD_FAIL_CHECK
60  */
61 #include <obd_support.h>
62 /* struct ptlrpc_thread */
63 #include <lustre_net.h>
64 #include <lustre_fid.h>
65 /* process_config */
66 #include <lustre_param.h>
67
68 #include "osd_internal.h"
69 #include "osd_dynlocks.h"
70
71 /* llo_* api support */
72 #include <md_object.h>
73 #include <lustre_quota.h>
74
75 #include <ldiskfs/xattr.h>
76 #include <lustre_linkea.h>
77
78 int ldiskfs_pdo = 1;
79 CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
80                 "ldiskfs with parallel directory operations");
81
82 int ldiskfs_track_declares_assert;
83 CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
84                 "LBUG during tracking of declares");
85
86 /* Slab to allocate dynlocks */
87 struct kmem_cache *dynlock_cachep;
88
89 static struct lu_kmem_descr ldiskfs_caches[] = {
90         {
91                 .ckd_cache = &dynlock_cachep,
92                 .ckd_name  = "dynlock_cache",
93                 .ckd_size  = sizeof(struct dynlock_handle)
94         },
95         {
96                 .ckd_cache = NULL
97         }
98 };
99
100 static const char dot[] = ".";
101 static const char dotdot[] = "..";
102 static const char remote_obj_dir[] = "REM_OBJ_DIR";
103
104 static const struct lu_object_operations      osd_lu_obj_ops;
105 static const struct dt_object_operations      osd_obj_ops;
106 static const struct dt_object_operations      osd_obj_ea_ops;
107 static const struct dt_object_operations      osd_obj_otable_it_ops;
108 static const struct dt_index_operations       osd_index_iam_ops;
109 static const struct dt_index_operations       osd_index_ea_ops;
110
111 int osd_trans_declare_op2rb[] = {
112         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
113         [OSD_OT_PUNCH]          = OSD_OT_MAX,
114         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
115         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
116         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
117         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
118         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
119         [OSD_OT_WRITE]          = OSD_OT_WRITE,
120         [OSD_OT_INSERT]         = OSD_OT_DELETE,
121         [OSD_OT_DELETE]         = OSD_OT_INSERT,
122         [OSD_OT_UPDATE]         = OSD_OT_MAX,
123         [OSD_OT_QUOTA]          = OSD_OT_MAX,
124 };
125
126 static int osd_has_index(const struct osd_object *obj)
127 {
128         return obj->oo_dt.do_index_ops != NULL;
129 }
130
131 static int osd_object_invariant(const struct lu_object *l)
132 {
133         return osd_invariant(osd_obj(l));
134 }
135
136 /*
137  * Concurrency: doesn't matter
138  */
139
140 /*
141  * Concurrency: doesn't matter
142  */
143 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
144 {
145         struct osd_thread_info *oti = osd_oti_get(env);
146         return oti->oti_w_locks > 0 && o->oo_owner == env;
147 }
148
149 /*
150  * Concurrency: doesn't access mutable data
151  */
152 static int osd_root_get(const struct lu_env *env,
153                         struct dt_device *dev, struct lu_fid *f)
154 {
155         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
156         return 0;
157 }
158
159 /*
160  * OSD object methods.
161  */
162
163 /*
164  * Concurrency: no concurrent access is possible that early in object
165  * life-cycle.
166  */
167 static struct lu_object *osd_object_alloc(const struct lu_env *env,
168                                           const struct lu_object_header *hdr,
169                                           struct lu_device *d)
170 {
171         struct osd_object *mo;
172
173         OBD_ALLOC_PTR(mo);
174         if (mo != NULL) {
175                 struct lu_object *l;
176
177                 l = &mo->oo_dt.do_lu;
178                 dt_object_init(&mo->oo_dt, NULL, d);
179                 mo->oo_dt.do_ops = &osd_obj_ea_ops;
180                 l->lo_ops = &osd_lu_obj_ops;
181                 init_rwsem(&mo->oo_sem);
182                 init_rwsem(&mo->oo_ext_idx_sem);
183                 spin_lock_init(&mo->oo_guard);
184                 return l;
185         } else {
186                 return NULL;
187         }
188 }
189
190 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
191                 struct dentry *dentry, struct lustre_mdt_attrs *lma)
192 {
193         int rc;
194
195         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
196         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
197                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
198         if (rc > 0) {
199                 if ((void *)lma != (void *)info->oti_mdt_attrs_old)
200                         memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
201                 rc = 0;
202                 lustre_lma_swab(lma);
203                 /* Check LMA compatibility */
204                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
205                         CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
206                               "for fid = "DFID", ino = %lu\n",
207                               LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
208                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
209                               PFID(&lma->lma_self_fid), inode->i_ino);
210                         rc = -EOPNOTSUPP;
211                 }
212         } else if (rc == 0) {
213                 rc = -ENODATA;
214         }
215
216         return rc;
217 }
218
219 /*
220  * retrieve object from backend ext fs.
221  **/
222 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
223                        struct osd_inode_id *id)
224 {
225         struct inode *inode = NULL;
226
227         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
228         if (IS_ERR(inode)) {
229                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
230                        id->oii_ino, PTR_ERR(inode));
231         } else if (id->oii_gen != OSD_OII_NOGEN &&
232                    inode->i_generation != id->oii_gen) {
233                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
234                        "i_generation = %u\n",
235                        id->oii_ino, id->oii_gen, inode->i_generation);
236                 iput(inode);
237                 inode = ERR_PTR(-ESTALE);
238         } else if (inode->i_nlink == 0) {
239                 /* due to parallel readdir and unlink,
240                 * we can have dead inode here. */
241                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
242                 iput(inode);
243                 inode = ERR_PTR(-ESTALE);
244         } else if (is_bad_inode(inode)) {
245                 CWARN("%.16s: bad inode: ino = %u\n",
246                 LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
247                 iput(inode);
248                 inode = ERR_PTR(-ENOENT);
249         } else {
250                 if (id->oii_gen == OSD_OII_NOGEN)
251                         osd_id_gen(id, inode->i_ino, inode->i_generation);
252
253                 /* Do not update file c/mtime in ldiskfs.
254                  * NB: we don't have any lock to protect this because we don't
255                  * have reference on osd_object now, but contention with
256                  * another lookup + attr_set can't happen in the tiny window
257                  * between if (...) and set S_NOCMTIME. */
258                 if (!(inode->i_flags & S_NOCMTIME))
259                         inode->i_flags |= S_NOCMTIME;
260         }
261         return inode;
262 }
263
264 static struct inode *
265 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
266              struct osd_inode_id *id, struct lu_fid *fid)
267 {
268         struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
269         struct inode            *inode;
270         int                      rc;
271
272         inode = osd_iget(info, dev, id);
273         if (IS_ERR(inode))
274                 return inode;
275
276         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
277         if (rc == 0) {
278                 *fid = lma->lma_self_fid;
279         } else if (rc == -ENODATA) {
280                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
281                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
282                 else
283                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
284         } else {
285                 iput(inode);
286                 inode = ERR_PTR(rc);
287         }
288         return inode;
289 }
290
291 static struct inode *osd_iget_check(struct osd_thread_info *info,
292                                     struct osd_device *dev,
293                                     const struct lu_fid *fid,
294                                     struct osd_inode_id *id,
295                                     bool in_oi)
296 {
297         struct inode    *inode;
298         int              rc     = 0;
299         ENTRY;
300
301         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
302         if (IS_ERR(inode)) {
303                 rc = PTR_ERR(inode);
304                 if (!in_oi || (rc != -ENOENT && rc != -ESTALE)) {
305                         CDEBUG(D_INODE, "no inode: ino = %u, rc = %d\n",
306                                id->oii_ino, rc);
307
308                         GOTO(put, rc);
309                 }
310
311                 goto check_oi;
312         }
313
314         if (is_bad_inode(inode)) {
315                 rc = -ENOENT;
316                 if (!in_oi) {
317                         CDEBUG(D_INODE, "bad inode: ino = %u\n", id->oii_ino);
318
319                         GOTO(put, rc);
320                 }
321
322                 goto check_oi;
323         }
324
325         if (id->oii_gen != OSD_OII_NOGEN &&
326             inode->i_generation != id->oii_gen) {
327                 rc = -ESTALE;
328                 if (!in_oi) {
329                         CDEBUG(D_INODE, "unmatched inode: ino = %u, "
330                                "oii_gen = %u, i_generation = %u\n",
331                                id->oii_ino, id->oii_gen, inode->i_generation);
332
333                         GOTO(put, rc);
334                 }
335
336                 goto check_oi;
337         }
338
339         if (inode->i_nlink == 0) {
340                 rc = -ENOENT;
341                 if (!in_oi) {
342                         CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
343
344                         GOTO(put, rc);
345                 }
346
347                 goto check_oi;
348         }
349
350 check_oi:
351         if (rc != 0) {
352                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
353
354                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
355                 /* XXX: There are some possible cases:
356                  *      1. rc = 0.
357                  *         Backup/restore caused the OI invalid.
358                  *      2. rc = 0.
359                  *         Someone unlinked the object but NOT removed
360                  *         the OI mapping, such as mount target device
361                  *         as ldiskfs, and modify something directly.
362                  *      3. rc = -ENOENT.
363                  *         Someone just removed the object between the
364                  *         former oi_lookup and the iget. It is normal.
365                  *      4. Other failure cases.
366                  *
367                  *      Generally, when the device is mounted, it will
368                  *      auto check whether the system is restored from
369                  *      file-level backup or not. We trust such detect
370                  *      to distinguish the 1st case from the 2nd case. */
371                 if (rc == 0) {
372                         if (!IS_ERR(inode) && inode->i_generation != 0 &&
373                             inode->i_generation == id->oii_gen)
374                                 rc = -ENOENT;
375                         else
376                                 rc = -EREMCHG;
377                 }
378         } else {
379                 if (id->oii_gen == OSD_OII_NOGEN)
380                         osd_id_gen(id, inode->i_ino, inode->i_generation);
381
382                 /* Do not update file c/mtime in ldiskfs.
383                  * NB: we don't have any lock to protect this because we don't
384                  * have reference on osd_object now, but contention with
385                  * another lookup + attr_set can't happen in the tiny window
386                  * between if (...) and set S_NOCMTIME. */
387                 if (!(inode->i_flags & S_NOCMTIME))
388                         inode->i_flags |= S_NOCMTIME;
389         }
390
391         GOTO(put, rc);
392
393 put:
394         if (rc != 0) {
395                 if (!IS_ERR(inode))
396                         iput(inode);
397
398                 inode = ERR_PTR(rc);
399         }
400
401         return inode;
402 }
403
404 /**
405  * \retval +v: new filter_fid, does not contain self-fid
406  * \retval 0:  filter_fid_old, contains self-fid
407  * \retval -v: other failure cases
408  */
409 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
410                  struct dentry *dentry, struct lu_fid *fid)
411 {
412         struct filter_fid_old   *ff     = &info->oti_ff;
413         struct ost_id           *ostid  = &info->oti_ostid;
414         int                      rc;
415
416         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
417         if (rc == sizeof(*ff)) {
418                 rc = 0;
419                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
420                 ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
421                 /* XXX: should use real OST index in the future. LU-3569 */
422                 ostid_to_fid(fid, ostid, 0);
423         } else if (rc == sizeof(struct filter_fid)) {
424                 rc = 1;
425         } else if (rc >= 0) {
426                 rc = -EINVAL;
427         }
428
429         return rc;
430 }
431
432 static int osd_lma_self_repair(struct osd_thread_info *info,
433                                struct osd_device *osd, struct inode *inode,
434                                const struct lu_fid *fid, __u32 compat)
435 {
436         handle_t *jh;
437         int       rc;
438
439         LASSERT(current->journal_info == NULL);
440
441         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
442                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
443         if (IS_ERR(jh)) {
444                 rc = PTR_ERR(jh);
445                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
446                       osd_name(osd), rc);
447                 return rc;
448         }
449
450         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
451         if (rc != 0)
452                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
453                       osd_name(osd), rc);
454         ldiskfs_journal_stop(jh);
455         return rc;
456 }
457
458 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
459 {
460         struct osd_thread_info  *info   = osd_oti_get(env);
461         struct osd_device       *osd    = osd_obj2dev(obj);
462         struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
463         struct inode            *inode  = obj->oo_inode;
464         struct dentry           *dentry = &info->oti_obj_dentry;
465         struct lu_fid           *fid    = NULL;
466         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
467         int                      rc;
468         ENTRY;
469
470         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
471         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
472                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
473         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
474                 fid = &lma->lma_self_fid;
475                 rc = osd_get_idif(info, inode, dentry, fid);
476                 if ((rc > 0) || (rc == -ENODATA && osd->od_lma_self_repair)) {
477                         /* For the given OST-object, if it has neither LMA nor
478                          * FID in XATTR_NAME_FID, then the given FID (which is
479                          * contained in the @obj, from client RPC for locating
480                          * the OST-object) is trusted. We use it to generate
481                          * the LMA. */
482                         osd_lma_self_repair(info, osd, inode, rfid,
483                                 fid_is_on_ost(info, osd, fid, OI_CHECK_FLD) ?
484                                 LMAC_FID_ON_OST : 0);
485                         RETURN(0);
486                 }
487         }
488
489         if (unlikely(rc == -ENODATA))
490                 RETURN(0);
491
492         if (rc < 0)
493                 RETURN(rc);
494
495         if (rc > 0) {
496                 rc = 0;
497                 lustre_lma_swab(lma);
498                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
499                              CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
500                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
501                               "fid = "DFID", ino = %lu\n", osd_name(osd),
502                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
503                               PFID(rfid), inode->i_ino);
504                         rc = -EOPNOTSUPP;
505                 } else if (!(lma->lma_compat & LMAC_NOT_IN_OI)) {
506                         fid = &lma->lma_self_fid;
507                 }
508         }
509
510         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
511                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
512                         struct ost_id   *oi   = &info->oti_ostid;
513                         struct lu_fid   *fid1 = &info->oti_fid3;
514                         __u32            idx  = fid_idif_ost_idx(rfid);
515
516                         /* For old IDIF, the OST index is not part of the IDIF,
517                          * Means that different OSTs may have the same IDIFs.
518                          * Under such case, we need to make some compatible
519                          * check to make sure to trigger OI scrub properly. */
520                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
521                                 /* Given @rfid is new, LMA is old. */
522                                 fid_to_ostid(fid, oi);
523                                 ostid_to_fid(fid1, oi, idx);
524                                 if (lu_fid_eq(fid1, rfid)) {
525                                         if (osd->od_lma_self_repair)
526                                                 osd_lma_self_repair(info, osd,
527                                                         inode, rfid,
528                                                         LMAC_FID_ON_OST);
529                                         RETURN(0);
530                                 }
531                         }
532                 }
533
534                 CDEBUG(D_INODE, "%s: FID "DFID" != self_fid "DFID"\n",
535                        osd_name(osd), PFID(rfid), PFID(fid));
536                 rc = -EREMCHG;
537         }
538
539         RETURN(rc);
540 }
541
542 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
543                           const struct lu_fid *fid,
544                           const struct lu_object_conf *conf)
545 {
546         struct osd_thread_info *info;
547         struct lu_device       *ldev   = obj->oo_dt.do_lu.lo_dev;
548         struct osd_device      *dev;
549         struct osd_idmap_cache *oic;
550         struct osd_inode_id    *id;
551         struct inode           *inode;
552         struct osd_scrub       *scrub;
553         struct scrub_file      *sf;
554         int                     result;
555         int                     saved  = 0;
556         bool                    in_oi  = false;
557         bool                    triggered = false;
558         ENTRY;
559
560         LINVRNT(osd_invariant(obj));
561         LASSERT(obj->oo_inode == NULL);
562         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
563
564         dev = osd_dev(ldev);
565         scrub = &dev->od_scrub;
566         sf = &scrub->os_file;
567         info = osd_oti_get(env);
568         LASSERT(info);
569         oic = &info->oti_cache;
570
571         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
572                 RETURN(-ENOENT);
573
574         /* For the object is created as locking anchor, or for the object to
575          * be created on disk. No need to osd_oi_lookup() at here because FID
576          * shouldn't never be re-used, if it's really a duplicate FID from
577          * unexpected reason, we should be able to detect it later by calling
578          * do_create->osd_oi_insert(). */
579         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
580                 GOTO(out, result = 0);
581
582         /* Search order: 1. per-thread cache. */
583         if (lu_fid_eq(fid, &oic->oic_fid) &&
584             likely(oic->oic_dev == dev)) {
585                 id = &oic->oic_lid;
586                 goto iget;
587         }
588
589         id = &info->oti_id;
590         if (!list_empty(&scrub->os_inconsistent_items)) {
591                 /* Search order: 2. OI scrub pending list. */
592                 result = osd_oii_lookup(dev, fid, id);
593                 if (result == 0)
594                         goto iget;
595         }
596
597         /* Search order: 3. OI files. */
598         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
599         if (result == -ENOENT) {
600                 if (!fid_is_norm(fid) ||
601                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
602                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
603                                       sf->sf_oi_bitmap))
604                         GOTO(out, result = 0);
605
606                 goto trigger;
607         }
608
609         if (result != 0)
610                 GOTO(out, result);
611
612         in_oi = true;
613
614 iget:
615         inode = osd_iget_check(info, dev, fid, id, in_oi);
616         if (IS_ERR(inode)) {
617                 result = PTR_ERR(inode);
618                 if (result == -ENOENT || result == -ESTALE) {
619                         if (!in_oi)
620                                 fid_zero(&oic->oic_fid);
621
622                         GOTO(out, result = -ENOENT);
623                 } else if (result == -EREMCHG) {
624
625 trigger:
626                         if (!in_oi)
627                                 fid_zero(&oic->oic_fid);
628
629                         if (unlikely(triggered))
630                                 GOTO(out, result = saved);
631
632                         triggered = true;
633                         if (thread_is_running(&scrub->os_thread)) {
634                                 result = -EINPROGRESS;
635                         } else if (!dev->od_noscrub) {
636                                 result = osd_scrub_start(dev);
637                                 LCONSOLE_WARN("%.16s: trigger OI scrub by RPC "
638                                               "for "DFID", rc = %d [1]\n",
639                                               osd_name(dev), PFID(fid),result);
640                                 if (result == 0 || result == -EALREADY)
641                                         result = -EINPROGRESS;
642                                 else
643                                         result = -EREMCHG;
644                         }
645
646                         /* We still have chance to get the valid inode: for the
647                          * object which is referenced by remote name entry, the
648                          * object on the local MDT will be linked under the dir
649                          * of "/REMOTE_PARENT_DIR" with its FID string as name.
650                          *
651                          * We do not know whether the object for the given FID
652                          * is referenced by some remote name entry or not, and
653                          * especially for DNE II, a multiple-linked object may
654                          * have many name entries reside on many MDTs.
655                          *
656                          * To simplify the operation, OSD will not distinguish
657                          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
658                          * only happened for the RPC from other MDT during the
659                          * OI scrub, or for the client side RPC with FID only,
660                          * such as FID to path, or from old connected client. */
661                         saved = result;
662                         result = osd_lookup_in_remote_parent(info, dev,
663                                                              fid, id);
664                         if (result == 0) {
665                                 in_oi = false;
666                                 goto iget;
667                         }
668
669                         result = saved;
670                 }
671
672                 GOTO(out, result);
673         }
674
675         obj->oo_inode = inode;
676         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
677
678         result = osd_check_lma(env, obj);
679         if (result != 0) {
680                 iput(inode);
681                 obj->oo_inode = NULL;
682                 if (result == -EREMCHG) {
683                         if (!in_oi) {
684                                 result = osd_oi_lookup(info, dev, fid, id,
685                                                        OI_CHECK_FLD);
686                                 if (result != 0) {
687                                         fid_zero(&oic->oic_fid);
688                                         GOTO(out, result);
689                                 }
690                         }
691
692                         goto trigger;
693                 }
694
695                 GOTO(out, result);
696         }
697
698         obj->oo_compat_dot_created = 1;
699         obj->oo_compat_dotdot_created = 1;
700
701         if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
702                 GOTO(out, result = 0);
703
704         LASSERT(obj->oo_hl_head == NULL);
705         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
706         if (obj->oo_hl_head == NULL) {
707                 obj->oo_inode = NULL;
708                 iput(inode);
709                 GOTO(out, result = -ENOMEM);
710         }
711         GOTO(out, result = 0);
712
713 out:
714         LINVRNT(osd_invariant(obj));
715         return result;
716 }
717
718 /*
719  * Concurrency: shouldn't matter.
720  */
721 static void osd_object_init0(struct osd_object *obj)
722 {
723         LASSERT(obj->oo_inode != NULL);
724         obj->oo_dt.do_body_ops = &osd_body_ops;
725         obj->oo_dt.do_lu.lo_header->loh_attr |=
726                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
727 }
728
729 /*
730  * Concurrency: no concurrent access is possible that early in object
731  * life-cycle.
732  */
733 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
734                            const struct lu_object_conf *conf)
735 {
736         struct osd_object *obj = osd_obj(l);
737         int result;
738
739         LINVRNT(osd_invariant(obj));
740
741         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
742                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
743                 l->lo_header->loh_attr |= LOHA_EXISTS;
744                 return 0;
745         }
746
747         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
748         obj->oo_dt.do_body_ops = &osd_body_ops_new;
749         if (result == 0 && obj->oo_inode != NULL)
750                 osd_object_init0(obj);
751
752         LINVRNT(osd_invariant(obj));
753         return result;
754 }
755
756 /*
757  * Concurrency: no concurrent access is possible that late in object
758  * life-cycle.
759  */
760 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
761 {
762         struct osd_object *obj = osd_obj(l);
763
764         LINVRNT(osd_invariant(obj));
765
766         dt_object_fini(&obj->oo_dt);
767         if (obj->oo_hl_head != NULL)
768                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
769         OBD_FREE_PTR(obj);
770 }
771
772 /*
773  * Concurrency: no concurrent access is possible that late in object
774  * life-cycle.
775  */
776 static void osd_index_fini(struct osd_object *o)
777 {
778         struct iam_container *bag;
779
780         if (o->oo_dir != NULL) {
781                 bag = &o->oo_dir->od_container;
782                 if (o->oo_inode != NULL) {
783                         if (bag->ic_object == o->oo_inode)
784                                 iam_container_fini(bag);
785                 }
786                 OBD_FREE_PTR(o->oo_dir);
787                 o->oo_dir = NULL;
788         }
789 }
790
791 /*
792  * Concurrency: no concurrent access is possible that late in object
793  * life-cycle (for all existing callers, that is. New callers have to provide
794  * their own locking.)
795  */
796 static int osd_inode_unlinked(const struct inode *inode)
797 {
798         return inode->i_nlink == 0;
799 }
800
801 enum {
802         OSD_TXN_OI_DELETE_CREDITS    = 20,
803         OSD_TXN_INODE_DELETE_CREDITS = 20
804 };
805
806 /*
807  * Journal
808  */
809
810 #if OSD_THANDLE_STATS
811 /**
812  * Set time when the handle is allocated
813  */
814 static void osd_th_alloced(struct osd_thandle *oth)
815 {
816         oth->oth_alloced = cfs_time_current();
817 }
818
819 /**
820  * Set time when the handle started
821  */
822 static void osd_th_started(struct osd_thandle *oth)
823 {
824         oth->oth_started = cfs_time_current();
825 }
826
827 /**
828  * Helper function to convert time interval to microseconds packed in
829  * long int.
830  */
831 static long interval_to_usec(cfs_time_t start, cfs_time_t end)
832 {
833         struct timeval val;
834
835         cfs_duration_usec(cfs_time_sub(end, start), &val);
836         return val.tv_sec * 1000000 + val.tv_usec;
837 }
838
839 /**
840  * Check whether the we deal with this handle for too long.
841  */
842 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
843                                 cfs_time_t alloced, cfs_time_t started,
844                                 cfs_time_t closed)
845 {
846         cfs_time_t now = cfs_time_current();
847
848         LASSERT(dev != NULL);
849
850         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
851                             interval_to_usec(alloced, started));
852         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
853                             interval_to_usec(started, closed));
854         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
855                             interval_to_usec(closed, now));
856
857         if (cfs_time_before(cfs_time_add(alloced, cfs_time_seconds(30)), now)) {
858                 CWARN("transaction handle %p was open for too long: "
859                       "now "CFS_TIME_T" ,"
860                       "alloced "CFS_TIME_T" ,"
861                       "started "CFS_TIME_T" ,"
862                       "closed "CFS_TIME_T"\n",
863                       oth, now, alloced, started, closed);
864                 libcfs_debug_dumpstack(NULL);
865         }
866 }
867
868 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
869 {                                                                       \
870         cfs_time_t __closed = cfs_time_current();                       \
871         cfs_time_t __alloced = oth->oth_alloced;                        \
872         cfs_time_t __started = oth->oth_started;                        \
873                                                                         \
874         expr;                                                           \
875         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
876 }
877
878 #else /* OSD_THANDLE_STATS */
879
880 #define osd_th_alloced(h)                  do {} while(0)
881 #define osd_th_started(h)                  do {} while(0)
882 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
883
884 #endif /* OSD_THANDLE_STATS */
885
886 /*
887  * Concurrency: doesn't access mutable data.
888  */
889 static int osd_param_is_not_sane(const struct osd_device *dev,
890                                  const struct thandle *th)
891 {
892         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
893
894         return oh->ot_credits > osd_transaction_size(dev);
895 }
896
897 /*
898  * Concurrency: shouldn't matter.
899  */
900 static void osd_trans_commit_cb(struct super_block *sb,
901                                 struct ldiskfs_journal_cb_entry *jcb, int error)
902 {
903         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
904         struct thandle     *th  = &oh->ot_super;
905         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
906         struct dt_txn_commit_cb *dcb, *tmp;
907
908         LASSERT(oh->ot_handle == NULL);
909
910         if (error)
911                 CERROR("transaction @0x%p commit error: %d\n", th, error);
912
913         dt_txn_hook_commit(th);
914
915         /* call per-transaction callbacks if any */
916         list_for_each_entry_safe(dcb, tmp, &oh->ot_dcb_list, dcb_linkage) {
917                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
918                          "commit callback entry: magic=%x name='%s'\n",
919                          dcb->dcb_magic, dcb->dcb_name);
920                 list_del_init(&dcb->dcb_linkage);
921                 dcb->dcb_func(NULL, th, dcb, error);
922         }
923
924         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
925         lu_device_put(lud);
926         th->th_dev = NULL;
927
928         lu_context_exit(&th->th_ctx);
929         lu_context_fini(&th->th_ctx);
930         thandle_put(th);
931 }
932
933 static struct thandle *osd_trans_create(const struct lu_env *env,
934                                         struct dt_device *d)
935 {
936         struct osd_thread_info  *oti = osd_oti_get(env);
937         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
938         struct osd_thandle      *oh;
939         struct thandle          *th;
940         ENTRY;
941
942         /* on pending IO in this thread should left from prev. request */
943         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
944
945         th = ERR_PTR(-ENOMEM);
946         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
947         if (oh != NULL) {
948                 oh->ot_quota_trans = &oti->oti_quota_trans;
949                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
950                 th = &oh->ot_super;
951                 th->th_dev = d;
952                 th->th_result = 0;
953                 th->th_tags = LCT_TX_HANDLE;
954                 oh->ot_credits = 0;
955                 atomic_set(&th->th_refc, 1);
956                 th->th_alloc_size = sizeof(*oh);
957                 oti->oti_dev = osd_dt_dev(d);
958                 INIT_LIST_HEAD(&oh->ot_dcb_list);
959                 osd_th_alloced(oh);
960
961                 memset(oti->oti_declare_ops, 0,
962                                         sizeof(oti->oti_declare_ops));
963                 memset(oti->oti_declare_ops_rb, 0,
964                                         sizeof(oti->oti_declare_ops_rb));
965                 memset(oti->oti_declare_ops_cred, 0,
966                                         sizeof(oti->oti_declare_ops_cred));
967                 oti->oti_rollback = false;
968         }
969         RETURN(th);
970 }
971
972 /*
973  * Concurrency: shouldn't matter.
974  */
975 int osd_trans_start(const struct lu_env *env, struct dt_device *d,
976                     struct thandle *th)
977 {
978         struct osd_thread_info *oti = osd_oti_get(env);
979         struct osd_device  *dev = osd_dt_dev(d);
980         handle_t           *jh;
981         struct osd_thandle *oh;
982         int rc;
983
984         ENTRY;
985
986         LASSERT(current->journal_info == NULL);
987
988         oh = container_of0(th, struct osd_thandle, ot_super);
989         LASSERT(oh != NULL);
990         LASSERT(oh->ot_handle == NULL);
991
992         rc = dt_txn_hook_start(env, d, th);
993         if (rc != 0)
994                 GOTO(out, rc);
995
996         if (unlikely(osd_param_is_not_sane(dev, th))) {
997                 static unsigned long last_printed;
998                 static int last_credits;
999
1000                 CWARN("%.16s: too many transaction credits (%d > %d)\n",
1001                       LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
1002                       oh->ot_credits,
1003                       osd_journal(dev)->j_max_transaction_buffers);
1004                 CWARN("  create: %u/%u, destroy: %u/%u\n",
1005                       oti->oti_declare_ops[OSD_OT_CREATE],
1006                       oti->oti_declare_ops_cred[OSD_OT_CREATE],
1007                       oti->oti_declare_ops[OSD_OT_DESTROY],
1008                       oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
1009                 CWARN("  attr_set: %u/%u, xattr_set: %u/%u\n",
1010                       oti->oti_declare_ops[OSD_OT_ATTR_SET],
1011                       oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1012                       oti->oti_declare_ops[OSD_OT_XATTR_SET],
1013                       oti->oti_declare_ops_cred[OSD_OT_XATTR_SET]);
1014                 CWARN("  write: %u/%u, punch: %u/%u, quota %u/%u\n",
1015                       oti->oti_declare_ops[OSD_OT_WRITE],
1016                       oti->oti_declare_ops_cred[OSD_OT_WRITE],
1017                       oti->oti_declare_ops[OSD_OT_PUNCH],
1018                       oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1019                       oti->oti_declare_ops[OSD_OT_QUOTA],
1020                       oti->oti_declare_ops_cred[OSD_OT_QUOTA]);
1021                 CWARN("  insert: %u/%u, delete: %u/%u\n",
1022                       oti->oti_declare_ops[OSD_OT_INSERT],
1023                       oti->oti_declare_ops_cred[OSD_OT_INSERT],
1024                       oti->oti_declare_ops[OSD_OT_DELETE],
1025                       oti->oti_declare_ops_cred[OSD_OT_DELETE]);
1026                 CWARN("  ref_add: %u/%u, ref_del: %u/%u\n",
1027                       oti->oti_declare_ops[OSD_OT_REF_ADD],
1028                       oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1029                       oti->oti_declare_ops[OSD_OT_REF_DEL],
1030                       oti->oti_declare_ops_cred[OSD_OT_REF_DEL]);
1031
1032                 if (last_credits != oh->ot_credits &&
1033                     time_after(jiffies, last_printed +
1034                                msecs_to_jiffies(60 * MSEC_PER_SEC))) {
1035                         libcfs_debug_dumpstack(NULL);
1036                         last_credits = oh->ot_credits;
1037                         last_printed = jiffies;
1038                 }
1039                 /* XXX Limit the credits to 'max_transaction_buffers', and
1040                  *     let the underlying filesystem to catch the error if
1041                  *     we really need so many credits.
1042                  *
1043                  *     This should be removed when we can calculate the
1044                  *     credits precisely. */
1045                 oh->ot_credits = osd_transaction_size(dev);
1046         }
1047
1048         /*
1049          * XXX temporary stuff. Some abstraction layer should
1050          * be used.
1051          */
1052         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1053         osd_th_started(oh);
1054         if (!IS_ERR(jh)) {
1055                 oh->ot_handle = jh;
1056                 LASSERT(oti->oti_txns == 0);
1057                 lu_context_init(&th->th_ctx, th->th_tags);
1058                 lu_context_enter(&th->th_ctx);
1059
1060                 lu_device_get(&d->dd_lu_dev);
1061                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1062                               "osd-tx", th);
1063                 oti->oti_txns++;
1064                 rc = 0;
1065         } else {
1066                 rc = PTR_ERR(jh);
1067         }
1068 out:
1069         RETURN(rc);
1070 }
1071
1072 static int osd_seq_exists(const struct lu_env *env,
1073                               struct osd_device *osd, obd_seq seq)
1074 {
1075         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1076         struct seq_server_site  *ss = osd_seq_site(osd);
1077         int                     rc;
1078         ENTRY;
1079
1080         LASSERT(ss != NULL);
1081         LASSERT(ss->ss_server_fld != NULL);
1082
1083         rc = osd_fld_lookup(env, osd, seq, range);
1084         if (rc != 0) {
1085                 if (rc != -ENOENT)
1086                         CERROR("%s: can't lookup FLD sequence "LPX64
1087                                ": rc = %d\n", osd_name(osd), seq, rc);
1088                 RETURN(0);
1089         }
1090
1091         RETURN(ss->ss_node_id == range->lsr_index);
1092 }
1093
1094 /*
1095  * Concurrency: shouldn't matter.
1096  */
1097 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1098                           struct thandle *th)
1099 {
1100         int                     rc = 0;
1101         struct osd_thandle     *oh;
1102         struct osd_thread_info *oti = osd_oti_get(env);
1103         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1104         struct qsd_instance    *qsd = oti->oti_dev->od_quota_slave;
1105         struct lquota_trans    *qtrans;
1106         ENTRY;
1107
1108         oh = container_of0(th, struct osd_thandle, ot_super);
1109
1110         qtrans = oh->ot_quota_trans;
1111         oh->ot_quota_trans = NULL;
1112
1113         if (oh->ot_handle != NULL) {
1114                 handle_t *hdl = oh->ot_handle;
1115
1116                 /*
1117                  * add commit callback
1118                  * notice we don't do this in osd_trans_start()
1119                  * as underlying transaction can change during truncate
1120                  */
1121                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1122                                          &oh->ot_jcb);
1123
1124                 LASSERT(oti->oti_txns == 1);
1125                 oti->oti_txns--;
1126                 rc = dt_txn_hook_stop(env, th);
1127                 if (rc != 0)
1128                         CERROR("Failure in transaction hook: %d\n", rc);
1129
1130                 /* hook functions might modify th_sync */
1131                 hdl->h_sync = th->th_sync;
1132
1133                 oh->ot_handle = NULL;
1134                 OSD_CHECK_SLOW_TH(oh, oti->oti_dev,
1135                                   rc = ldiskfs_journal_stop(hdl));
1136                 if (rc != 0)
1137                         CERROR("Failure to stop transaction: %d\n", rc);
1138         } else {
1139                 thandle_put(&oh->ot_super);
1140         }
1141
1142         /* inform the quota slave device that the transaction is stopping */
1143         qsd_op_end(env, qsd, qtrans);
1144
1145         /* as we want IO to journal and data IO be concurrent, we don't block
1146          * awaiting data IO completion in osd_do_bio(), instead we wait here
1147          * once transaction is submitted to the journal. all reqular requests
1148          * don't do direct IO (except read/write), thus this wait_event becomes
1149          * no-op for them.
1150          *
1151          * IMPORTANT: we have to wait till any IO submited by the thread is
1152          * completed otherwise iobuf may be corrupted by different request
1153          */
1154         wait_event(iobuf->dr_wait,
1155                        atomic_read(&iobuf->dr_numreqs) == 0);
1156         osd_fini_iobuf(oti->oti_dev, iobuf);
1157         if (!rc)
1158                 rc = iobuf->dr_error;
1159
1160         RETURN(rc);
1161 }
1162
1163 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1164 {
1165         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1166                                                ot_super);
1167
1168         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1169         LASSERT(&dcb->dcb_func != NULL);
1170         list_add(&dcb->dcb_linkage, &oh->ot_dcb_list);
1171
1172         return 0;
1173 }
1174
1175 /*
1176  * Called just before object is freed. Releases all resources except for
1177  * object itself (that is released by osd_object_free()).
1178  *
1179  * Concurrency: no concurrent access is possible that late in object
1180  * life-cycle.
1181  */
1182 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1183 {
1184         struct osd_object *obj   = osd_obj(l);
1185         struct inode      *inode = obj->oo_inode;
1186
1187         LINVRNT(osd_invariant(obj));
1188
1189         /*
1190          * If object is unlinked remove fid->ino mapping from object index.
1191          */
1192
1193         osd_index_fini(obj);
1194         if (inode != NULL) {
1195                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1196                 qid_t                    uid = i_uid_read(inode);
1197                 qid_t                    gid = i_gid_read(inode);
1198
1199                 iput(inode);
1200                 obj->oo_inode = NULL;
1201
1202                 if (qsd != NULL) {
1203                         struct osd_thread_info  *info = osd_oti_get(env);
1204                         struct lquota_id_info   *qi = &info->oti_qi;
1205
1206                         /* Release granted quota to master if necessary */
1207                         qi->lqi_id.qid_uid = uid;
1208                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1209
1210                         qi->lqi_id.qid_uid = gid;
1211                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1212                 }
1213         }
1214 }
1215
1216 /*
1217  * Concurrency: ->loo_object_release() is called under site spin-lock.
1218  */
1219 static void osd_object_release(const struct lu_env *env,
1220                                struct lu_object *l)
1221 {
1222 }
1223
1224 /*
1225  * Concurrency: shouldn't matter.
1226  */
1227 static int osd_object_print(const struct lu_env *env, void *cookie,
1228                             lu_printer_t p, const struct lu_object *l)
1229 {
1230         struct osd_object *o = osd_obj(l);
1231         struct iam_descr  *d;
1232
1233         if (o->oo_dir != NULL)
1234                 d = o->oo_dir->od_container.ic_descr;
1235         else
1236                 d = NULL;
1237         return (*p)(env, cookie,
1238                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1239                     o, o->oo_inode,
1240                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
1241                     o->oo_inode ? o->oo_inode->i_generation : 0,
1242                     d ? d->id_ops->id_name : "plain");
1243 }
1244
1245 #define GRANT_FOR_LOCAL_OIDS 32 /* 128kB for last_rcvd, quota files, ... */
1246
1247 /*
1248  * Concurrency: shouldn't matter.
1249  */
1250 int osd_statfs(const struct lu_env *env, struct dt_device *d,
1251                struct obd_statfs *sfs)
1252 {
1253         struct osd_device  *osd = osd_dt_dev(d);
1254         struct super_block *sb = osd_sb(osd);
1255         struct kstatfs     *ksfs;
1256         int result = 0;
1257
1258         if (unlikely(osd->od_mnt == NULL))
1259                 return -EINPROGRESS;
1260
1261         /* osd_lproc.c call this without env, allocate ksfs for that case */
1262         if (unlikely(env == NULL)) {
1263                 OBD_ALLOC_PTR(ksfs);
1264                 if (ksfs == NULL)
1265                         return -ENOMEM;
1266         } else {
1267                 ksfs = &osd_oti_get(env)->oti_ksfs;
1268         }
1269
1270         spin_lock(&osd->od_osfs_lock);
1271         result = sb->s_op->statfs(sb->s_root, ksfs);
1272         if (likely(result == 0)) { /* N.B. statfs can't really fail */
1273                 statfs_pack(sfs, ksfs);
1274                 if (sb->s_flags & MS_RDONLY)
1275                         sfs->os_state = OS_STATE_READONLY;
1276         }
1277
1278         spin_unlock(&osd->od_osfs_lock);
1279
1280         if (unlikely(env == NULL))
1281                 OBD_FREE_PTR(ksfs);
1282
1283         /* Reserve a small amount of space for local objects like last_rcvd,
1284          * llog, quota files, ... */
1285         if (sfs->os_bavail <= GRANT_FOR_LOCAL_OIDS) {
1286                 sfs->os_bavail = 0;
1287         } else {
1288                 sfs->os_bavail -= GRANT_FOR_LOCAL_OIDS;
1289                 /** Take out metadata overhead for indirect blocks */
1290                 sfs->os_bavail -= sfs->os_bavail >> (sb->s_blocksize_bits - 3);
1291         }
1292
1293         return result;
1294 }
1295
1296 /**
1297  * Estimate space needed for file creations. We assume the largest filename
1298  * which is 2^64 - 1, hence a filename of 20 chars.
1299  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
1300  */
1301 #ifdef __LDISKFS_DIR_REC_LEN
1302 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
1303 #else
1304 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
1305 #endif
1306
1307 /*
1308  * Concurrency: doesn't access mutable data.
1309  */
1310 static void osd_conf_get(const struct lu_env *env,
1311                          const struct dt_device *dev,
1312                          struct dt_device_param *param)
1313 {
1314         struct super_block *sb = osd_sb(osd_dt_dev(dev));
1315         int                ea_overhead;
1316
1317         /*
1318          * XXX should be taken from not-yet-existing fs abstraction layer.
1319          */
1320         param->ddp_max_name_len = LDISKFS_NAME_LEN;
1321         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
1322         param->ddp_block_shift  = sb->s_blocksize_bits;
1323         param->ddp_mount_type     = LDD_MT_LDISKFS;
1324         param->ddp_maxbytes       = sb->s_maxbytes;
1325         /* Overhead estimate should be fairly accurate, so we really take a tiny
1326          * error margin which also avoids fragmenting the filesystem too much */
1327         param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
1328         /* inode are statically allocated, so per-inode space consumption
1329          * is the space consumed by the directory entry */
1330         param->ddp_inodespace     = PER_OBJ_USAGE;
1331         /* per-fragment overhead to be used by the client code */
1332         param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
1333         param->ddp_mntopts      = 0;
1334         if (test_opt(sb, XATTR_USER))
1335                 param->ddp_mntopts |= MNTOPT_USERXATTR;
1336         if (test_opt(sb, POSIX_ACL))
1337                 param->ddp_mntopts |= MNTOPT_ACL;
1338
1339         /* LOD might calculate the max stripe count based on max_ea_size,
1340          * so we need take account in the overhead as well,
1341          * xattr_header + magic + xattr_entry_head */
1342         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
1343                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
1344
1345 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
1346         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
1347                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
1348                                                                 ea_overhead;
1349         else
1350 #endif
1351                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
1352 }
1353
1354 /*
1355  * Concurrency: shouldn't matter.
1356  */
1357 static int osd_sync(const struct lu_env *env, struct dt_device *d)
1358 {
1359         CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1360         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
1361 }
1362
1363 /**
1364  * Start commit for OSD device.
1365  *
1366  * An implementation of dt_commit_async method for OSD device.
1367  * Asychronously starts underlayng fs sync and thereby a transaction
1368  * commit.
1369  *
1370  * \param env environment
1371  * \param d dt device
1372  *
1373  * \see dt_device_operations
1374  */
1375 static int osd_commit_async(const struct lu_env *env,
1376                             struct dt_device *d)
1377 {
1378         struct super_block *s = osd_sb(osd_dt_dev(d));
1379         ENTRY;
1380
1381         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1382         RETURN(s->s_op->sync_fs(s, 0));
1383 }
1384
1385 /*
1386  * Concurrency: shouldn't matter.
1387  */
1388
1389 static int osd_ro(const struct lu_env *env, struct dt_device *d)
1390 {
1391         struct super_block *sb = osd_sb(osd_dt_dev(d));
1392         struct block_device *dev = sb->s_bdev;
1393 #ifdef HAVE_DEV_SET_RDONLY
1394         struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
1395         int rc = 0;
1396 #else
1397         int rc = -EOPNOTSUPP;
1398 #endif
1399         ENTRY;
1400
1401 #ifdef HAVE_DEV_SET_RDONLY
1402         CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
1403
1404         if (jdev && (jdev != dev)) {
1405                 CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
1406                        (long)jdev);
1407                 dev_set_rdonly(jdev);
1408         }
1409         CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
1410         dev_set_rdonly(dev);
1411 #else
1412         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
1413                osd_dt_dev(d)->od_svname, (long)dev, rc);
1414 #endif
1415         RETURN(rc);
1416 }
1417
1418 /*
1419  * Concurrency: serialization provided by callers.
1420  */
1421 static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
1422                               int mode, unsigned long timeout, __u32 alg,
1423                               struct lustre_capa_key *keys)
1424 {
1425         struct osd_device *dev = osd_dt_dev(d);
1426         ENTRY;
1427
1428         dev->od_fl_capa = mode;
1429         dev->od_capa_timeout = timeout;
1430         dev->od_capa_alg = alg;
1431         dev->od_capa_keys = keys;
1432         RETURN(0);
1433 }
1434
1435 /**
1436  * Note: we do not count into QUOTA here.
1437  * If we mount with --data_journal we may need more.
1438  */
1439 const int osd_dto_credits_noquota[DTO_NR] = {
1440         /**
1441          * Insert.
1442          * INDEX_EXTRA_TRANS_BLOCKS(8) +
1443          * SINGLEDATA_TRANS_BLOCKS(8)
1444          * XXX Note: maybe iam need more, since iam have more level than
1445          *           EXT3 htree.
1446          */
1447         [DTO_INDEX_INSERT]  = 16,
1448         /**
1449          * Delete
1450          * just modify a single entry, probably merge few within a block
1451          */
1452         [DTO_INDEX_DELETE]  = 1,
1453         /**
1454          * Used for OI scrub
1455          */
1456         [DTO_INDEX_UPDATE]  = 16,
1457         /**
1458          * 4(inode, inode bits, groups, GDT)
1459          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
1460          */
1461         [DTO_OBJECT_CREATE] = 4,
1462         /**
1463          * 4(inode, inode bits, groups, GDT)
1464          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
1465          */
1466         [DTO_OBJECT_DELETE] = 4,
1467         /**
1468          * Attr set credits (inode)
1469          */
1470         [DTO_ATTR_SET_BASE] = 1,
1471         /**
1472          * Xattr set. The same as xattr of EXT3.
1473          * DATA_TRANS_BLOCKS(14)
1474          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
1475          * are also counted in. Do not know why?
1476          */
1477         [DTO_XATTR_SET]     = 14,
1478         /**
1479          * credits for inode change during write.
1480          */
1481         [DTO_WRITE_BASE]    = 3,
1482         /**
1483          * credits for single block write.
1484          */
1485         [DTO_WRITE_BLOCK]   = 14,
1486         /**
1487          * Attr set credits for chown.
1488          * This is extra credits for setattr, and it is null without quota
1489          */
1490         [DTO_ATTR_SET_CHOWN] = 0
1491 };
1492
1493 static const struct dt_device_operations osd_dt_ops = {
1494         .dt_root_get       = osd_root_get,
1495         .dt_statfs         = osd_statfs,
1496         .dt_trans_create   = osd_trans_create,
1497         .dt_trans_start    = osd_trans_start,
1498         .dt_trans_stop     = osd_trans_stop,
1499         .dt_trans_cb_add   = osd_trans_cb_add,
1500         .dt_conf_get       = osd_conf_get,
1501         .dt_sync           = osd_sync,
1502         .dt_ro             = osd_ro,
1503         .dt_commit_async   = osd_commit_async,
1504         .dt_init_capa_ctxt = osd_init_capa_ctxt,
1505 };
1506
1507 static void osd_object_read_lock(const struct lu_env *env,
1508                                  struct dt_object *dt, unsigned role)
1509 {
1510         struct osd_object *obj = osd_dt_obj(dt);
1511         struct osd_thread_info *oti = osd_oti_get(env);
1512
1513         LINVRNT(osd_invariant(obj));
1514
1515         LASSERT(obj->oo_owner != env);
1516         down_read_nested(&obj->oo_sem, role);
1517
1518         LASSERT(obj->oo_owner == NULL);
1519         oti->oti_r_locks++;
1520 }
1521
1522 static void osd_object_write_lock(const struct lu_env *env,
1523                                   struct dt_object *dt, unsigned role)
1524 {
1525         struct osd_object *obj = osd_dt_obj(dt);
1526         struct osd_thread_info *oti = osd_oti_get(env);
1527
1528         LINVRNT(osd_invariant(obj));
1529
1530         LASSERT(obj->oo_owner != env);
1531         down_write_nested(&obj->oo_sem, role);
1532
1533         LASSERT(obj->oo_owner == NULL);
1534         obj->oo_owner = env;
1535         oti->oti_w_locks++;
1536 }
1537
1538 static void osd_object_read_unlock(const struct lu_env *env,
1539                                    struct dt_object *dt)
1540 {
1541         struct osd_object *obj = osd_dt_obj(dt);
1542         struct osd_thread_info *oti = osd_oti_get(env);
1543
1544         LINVRNT(osd_invariant(obj));
1545
1546         LASSERT(oti->oti_r_locks > 0);
1547         oti->oti_r_locks--;
1548         up_read(&obj->oo_sem);
1549 }
1550
1551 static void osd_object_write_unlock(const struct lu_env *env,
1552                                     struct dt_object *dt)
1553 {
1554         struct osd_object *obj = osd_dt_obj(dt);
1555         struct osd_thread_info *oti = osd_oti_get(env);
1556
1557         LINVRNT(osd_invariant(obj));
1558
1559         LASSERT(obj->oo_owner == env);
1560         LASSERT(oti->oti_w_locks > 0);
1561         oti->oti_w_locks--;
1562         obj->oo_owner = NULL;
1563         up_write(&obj->oo_sem);
1564 }
1565
1566 static int osd_object_write_locked(const struct lu_env *env,
1567                                    struct dt_object *dt)
1568 {
1569         struct osd_object *obj = osd_dt_obj(dt);
1570
1571         LINVRNT(osd_invariant(obj));
1572
1573         return obj->oo_owner == env;
1574 }
1575
1576 static int capa_is_sane(const struct lu_env *env,
1577                         struct osd_device *dev,
1578                         struct lustre_capa *capa,
1579                         struct lustre_capa_key *keys)
1580 {
1581         struct osd_thread_info *oti = osd_oti_get(env);
1582         struct lustre_capa *tcapa = &oti->oti_capa;
1583         struct obd_capa *oc;
1584         int i, rc = 0;
1585         ENTRY;
1586
1587         oc = capa_lookup(dev->od_capa_hash, capa, 0);
1588         if (oc) {
1589                 if (capa_is_expired(oc)) {
1590                         DEBUG_CAPA(D_ERROR, capa, "expired");
1591                         rc = -ESTALE;
1592                 }
1593                 capa_put(oc);
1594                 RETURN(rc);
1595         }
1596
1597         if (capa_is_expired_sec(capa)) {
1598                 DEBUG_CAPA(D_ERROR, capa, "expired");
1599                 RETURN(-ESTALE);
1600         }
1601
1602         spin_lock(&capa_lock);
1603         for (i = 0; i < 2; i++) {
1604                 if (keys[i].lk_keyid == capa->lc_keyid) {
1605                         oti->oti_capa_key = keys[i];
1606                         break;
1607                 }
1608         }
1609         spin_unlock(&capa_lock);
1610
1611         if (i == 2) {
1612                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
1613                 RETURN(-ESTALE);
1614         }
1615
1616         rc = capa_hmac(tcapa->lc_hmac, capa, oti->oti_capa_key.lk_key);
1617         if (rc)
1618                 RETURN(rc);
1619
1620         if (memcmp(tcapa->lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac))) {
1621                 DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
1622                 RETURN(-EACCES);
1623         }
1624
1625         oc = capa_add(dev->od_capa_hash, capa);
1626         capa_put(oc);
1627
1628         RETURN(0);
1629 }
1630
1631 int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
1632                     struct lustre_capa *capa, __u64 opc)
1633 {
1634         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1635         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
1636         struct lu_capainfo *lci;
1637         int rc;
1638
1639         if (!osd->od_fl_capa)
1640                 return 0;
1641
1642         if (capa == BYPASS_CAPA)
1643                 return 0;
1644
1645         lci = lu_capainfo_get(env);
1646         if (unlikely(lci == NULL))
1647                 return 0;
1648
1649         if (lci->lci_auth == LC_ID_NONE)
1650                 return 0;
1651
1652         if (capa == NULL) {
1653                 CERROR("%s: no capability provided for FID "DFID": rc = %d\n",
1654                        osd_name(osd), PFID(fid), -EACCES);
1655                 return -EACCES;
1656         }
1657
1658         if (!lu_fid_eq(fid, &capa->lc_fid)) {
1659                 DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
1660                            PFID(fid));
1661                 return -EACCES;
1662         }
1663
1664         if (!capa_opc_supported(capa, opc)) {
1665                 DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
1666                 return -EACCES;
1667         }
1668
1669         rc = capa_is_sane(env, osd, capa, osd->od_capa_keys);
1670         if (rc != 0) {
1671                 DEBUG_CAPA(D_ERROR, capa, "insane: rc = %d", rc);
1672                 return -EACCES;
1673         }
1674
1675         return 0;
1676 }
1677
1678 static struct timespec *osd_inode_time(const struct lu_env *env,
1679                                        struct inode *inode, __u64 seconds)
1680 {
1681         struct osd_thread_info  *oti = osd_oti_get(env);
1682         struct timespec         *t   = &oti->oti_time;
1683
1684         t->tv_sec = seconds;
1685         t->tv_nsec = 0;
1686         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
1687         return t;
1688 }
1689
1690
1691 static void osd_inode_getattr(const struct lu_env *env,
1692                               struct inode *inode, struct lu_attr *attr)
1693 {
1694         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
1695                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
1696                            LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE |
1697                            LA_TYPE;
1698
1699         attr->la_atime   = LTIME_S(inode->i_atime);
1700         attr->la_mtime   = LTIME_S(inode->i_mtime);
1701         attr->la_ctime   = LTIME_S(inode->i_ctime);
1702         attr->la_mode    = inode->i_mode;
1703         attr->la_size    = i_size_read(inode);
1704         attr->la_blocks  = inode->i_blocks;
1705         attr->la_uid     = i_uid_read(inode);
1706         attr->la_gid     = i_gid_read(inode);
1707         attr->la_flags   = LDISKFS_I(inode)->i_flags;
1708         attr->la_nlink   = inode->i_nlink;
1709         attr->la_rdev    = inode->i_rdev;
1710         attr->la_blksize = 1 << inode->i_blkbits;
1711         attr->la_blkbits = inode->i_blkbits;
1712 }
1713
1714 static int osd_attr_get(const struct lu_env *env,
1715                         struct dt_object *dt,
1716                         struct lu_attr *attr,
1717                         struct lustre_capa *capa)
1718 {
1719         struct osd_object *obj = osd_dt_obj(dt);
1720
1721         LASSERT(dt_object_exists(dt));
1722         LASSERT(!dt_object_remote(dt));
1723         LINVRNT(osd_invariant(obj));
1724
1725         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1726                 return -EACCES;
1727
1728         spin_lock(&obj->oo_guard);
1729         osd_inode_getattr(env, obj->oo_inode, attr);
1730         spin_unlock(&obj->oo_guard);
1731         return 0;
1732 }
1733
1734 static int osd_declare_attr_set(const struct lu_env *env,
1735                                 struct dt_object *dt,
1736                                 const struct lu_attr *attr,
1737                                 struct thandle *handle)
1738 {
1739         struct osd_thandle     *oh;
1740         struct osd_object      *obj;
1741         struct osd_thread_info *info = osd_oti_get(env);
1742         struct lquota_id_info  *qi = &info->oti_qi;
1743         qid_t                   uid;
1744         qid_t                   gid;
1745         long long               bspace;
1746         int                     rc = 0;
1747         bool                    enforce;
1748         ENTRY;
1749
1750         LASSERT(dt != NULL);
1751         LASSERT(handle != NULL);
1752
1753         obj = osd_dt_obj(dt);
1754         LASSERT(osd_invariant(obj));
1755
1756         oh = container_of0(handle, struct osd_thandle, ot_super);
1757         LASSERT(oh->ot_handle == NULL);
1758
1759         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
1760                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
1761
1762         if (attr == NULL || obj->oo_inode == NULL)
1763                 RETURN(rc);
1764
1765         bspace   = obj->oo_inode->i_blocks;
1766         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
1767         bspace   = toqb(bspace);
1768
1769         /* Changing ownership is always preformed by super user, it should not
1770          * fail with EDQUOT.
1771          *
1772          * We still need to call the osd_declare_qid() to calculate the journal
1773          * credits for updating quota accounting files and to trigger quota
1774          * space adjustment once the operation is completed.*/
1775         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
1776                 /* USERQUOTA */
1777                 uid = i_uid_read(obj->oo_inode);
1778                 qi->lqi_type = USRQUOTA;
1779                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
1780                 /* inode accounting */
1781                 qi->lqi_is_blk = false;
1782
1783                 /* one more inode for the new uid ... */
1784                 qi->lqi_id.qid_uid = attr->la_uid;
1785                 qi->lqi_space      = 1;
1786                 /* Reserve credits for the new uid */
1787                 rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
1788                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1789                         rc = 0;
1790                 if (rc)
1791                         RETURN(rc);
1792
1793                 /* and one less inode for the current uid */
1794                 qi->lqi_id.qid_uid = uid;
1795                 qi->lqi_space      = -1;
1796                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1797                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1798                         rc = 0;
1799                 if (rc)
1800                         RETURN(rc);
1801
1802                 /* block accounting */
1803                 qi->lqi_is_blk = true;
1804
1805                 /* more blocks for the new uid ... */
1806                 qi->lqi_id.qid_uid = attr->la_uid;
1807                 qi->lqi_space      = bspace;
1808                 /*
1809                  * Credits for the new uid has been reserved, re-use "obj"
1810                  * to save credit reservation.
1811                  */
1812                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1813                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1814                         rc = 0;
1815                 if (rc)
1816                         RETURN(rc);
1817
1818                 /* and finally less blocks for the current uid */
1819                 qi->lqi_id.qid_uid = uid;
1820                 qi->lqi_space      = -bspace;
1821                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1822                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1823                         rc = 0;
1824                 if (rc)
1825                         RETURN(rc);
1826
1827                 /* GROUP QUOTA */
1828                 gid = i_gid_read(obj->oo_inode);
1829                 qi->lqi_type = GRPQUOTA;
1830                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
1831
1832                 /* inode accounting */
1833                 qi->lqi_is_blk = false;
1834
1835                 /* one more inode for the new gid ... */
1836                 qi->lqi_id.qid_gid = attr->la_gid;
1837                 qi->lqi_space      = 1;
1838                 rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
1839                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1840                         rc = 0;
1841                 if (rc)
1842                         RETURN(rc);
1843
1844                 /* and one less inode for the current gid */
1845                 qi->lqi_id.qid_gid = gid;
1846                 qi->lqi_space      = -1;
1847                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1848                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1849                         rc = 0;
1850                 if (rc)
1851                         RETURN(rc);
1852
1853                 /* block accounting */
1854                 qi->lqi_is_blk = true;
1855
1856                 /* more blocks for the new gid ... */
1857                 qi->lqi_id.qid_gid = attr->la_gid;
1858                 qi->lqi_space      = bspace;
1859                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1860                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1861                         rc = 0;
1862                 if (rc)
1863                         RETURN(rc);
1864
1865                 /* and finally less blocks for the current gid */
1866                 qi->lqi_id.qid_gid = gid;
1867                 qi->lqi_space      = -bspace;
1868                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1869                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1870                         rc = 0;
1871                 if (rc)
1872                         RETURN(rc);
1873         }
1874
1875         RETURN(rc);
1876 }
1877
1878 static int osd_inode_setattr(const struct lu_env *env,
1879                              struct inode *inode, const struct lu_attr *attr)
1880 {
1881         __u64 bits = attr->la_valid;
1882
1883         /* Only allow set size for regular file */
1884         if (!S_ISREG(inode->i_mode))
1885                 bits &= ~(LA_SIZE | LA_BLOCKS);
1886
1887         if (bits == 0)
1888                 return 0;
1889
1890         if (bits & LA_ATIME)
1891                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1892         if (bits & LA_CTIME)
1893                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1894         if (bits & LA_MTIME)
1895                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1896         if (bits & LA_SIZE) {
1897                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1898                 i_size_write(inode, attr->la_size);
1899         }
1900
1901 #if 0
1902         /* OSD should not change "i_blocks" which is used by quota.
1903          * "i_blocks" should be changed by ldiskfs only. */
1904         if (bits & LA_BLOCKS)
1905                 inode->i_blocks = attr->la_blocks;
1906 #endif
1907         if (bits & LA_MODE)
1908                 inode->i_mode = (inode->i_mode & S_IFMT) |
1909                                 (attr->la_mode & ~S_IFMT);
1910         if (bits & LA_UID)
1911                 i_uid_write(inode, attr->la_uid);
1912         if (bits & LA_GID)
1913                 i_gid_write(inode, attr->la_gid);
1914         if (bits & LA_NLINK)
1915                 set_nlink(inode, attr->la_nlink);
1916         if (bits & LA_RDEV)
1917                 inode->i_rdev = attr->la_rdev;
1918
1919         if (bits & LA_FLAGS) {
1920                 /* always keep S_NOCMTIME */
1921                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
1922                                  S_NOCMTIME;
1923         }
1924         return 0;
1925 }
1926
1927 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
1928 {
1929         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
1930             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
1931                 struct iattr    iattr;
1932                 int             rc;
1933
1934                 ll_vfs_dq_init(inode);
1935                 iattr.ia_valid = 0;
1936                 if (attr->la_valid & LA_UID)
1937                         iattr.ia_valid |= ATTR_UID;
1938                 if (attr->la_valid & LA_GID)
1939                         iattr.ia_valid |= ATTR_GID;
1940                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
1941                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
1942
1943                 rc = ll_vfs_dq_transfer(inode, &iattr);
1944                 if (rc) {
1945                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
1946                                "enforcement enabled on the ldiskfs "
1947                                "filesystem?\n", inode->i_sb->s_id, rc);
1948                         return rc;
1949                 }
1950         }
1951         return 0;
1952 }
1953
1954 static int osd_attr_set(const struct lu_env *env,
1955                         struct dt_object *dt,
1956                         const struct lu_attr *attr,
1957                         struct thandle *handle,
1958                         struct lustre_capa *capa)
1959 {
1960         struct osd_object *obj = osd_dt_obj(dt);
1961         struct inode      *inode;
1962         int rc;
1963
1964         LASSERT(handle != NULL);
1965         LASSERT(dt_object_exists(dt));
1966         LASSERT(!dt_object_remote(dt));
1967         LASSERT(osd_invariant(obj));
1968
1969         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1970                 return -EACCES;
1971
1972         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
1973
1974         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
1975                 struct osd_thread_info  *oti  = osd_oti_get(env);
1976                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
1977                 struct lu_fid           *fid1 = &oti->oti_fid;
1978                 struct osd_inode_id     *id   = &oti->oti_id;
1979                 struct iam_path_descr   *ipd;
1980                 struct iam_container    *bag;
1981                 struct osd_thandle      *oh;
1982                 int                      rc;
1983
1984                 fid_cpu_to_be(fid1, fid0);
1985                 memset(id, 1, sizeof(*id));
1986                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
1987                                   fid0)->oi_dir.od_container;
1988                 ipd = osd_idx_ipd_get(env, bag);
1989                 if (unlikely(ipd == NULL))
1990                         RETURN(-ENOMEM);
1991
1992                 oh = container_of0(handle, struct osd_thandle, ot_super);
1993                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
1994                                 (const struct iam_rec *)id, ipd);
1995                 osd_ipd_put(env, bag, ipd);
1996                 return(rc > 0 ? 0 : rc);
1997         }
1998
1999         inode = obj->oo_inode;
2000
2001         rc = osd_quota_transfer(inode, attr);
2002         if (rc)
2003                 return rc;
2004
2005         spin_lock(&obj->oo_guard);
2006         rc = osd_inode_setattr(env, inode, attr);
2007         spin_unlock(&obj->oo_guard);
2008
2009         if (!rc)
2010                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2011         return rc;
2012 }
2013
2014 struct dentry *osd_child_dentry_get(const struct lu_env *env,
2015                                     struct osd_object *obj,
2016                                     const char *name, const int namelen)
2017 {
2018         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2019 }
2020
2021 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2022                       umode_t mode, struct dt_allocation_hint *hint,
2023                       struct thandle *th)
2024 {
2025         int result;
2026         struct osd_device  *osd = osd_obj2dev(obj);
2027         struct osd_thandle *oth;
2028         struct dt_object   *parent = NULL;
2029         struct inode       *inode;
2030
2031         LINVRNT(osd_invariant(obj));
2032         LASSERT(obj->oo_inode == NULL);
2033         LASSERT(obj->oo_hl_head == NULL);
2034
2035         if (S_ISDIR(mode) && ldiskfs_pdo) {
2036                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2037                 if (obj->oo_hl_head == NULL)
2038                         return -ENOMEM;
2039         }
2040
2041         oth = container_of(th, struct osd_thandle, ot_super);
2042         LASSERT(oth->ot_handle->h_transaction != NULL);
2043
2044         if (hint && hint->dah_parent)
2045                 parent = hint->dah_parent;
2046
2047         inode = ldiskfs_create_inode(oth->ot_handle,
2048                                      parent ? osd_dt_obj(parent)->oo_inode :
2049                                               osd_sb(osd)->s_root->d_inode,
2050                                      mode);
2051         if (!IS_ERR(inode)) {
2052                 /* Do not update file c/mtime in ldiskfs.
2053                  * NB: don't need any lock because no contention at this
2054                  * early stage */
2055                 inode->i_flags |= S_NOCMTIME;
2056
2057                 /* For new created object, it must be consistent,
2058                  * and it is unnecessary to scrub against it. */
2059                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2060                 obj->oo_inode = inode;
2061                 result = 0;
2062         } else {
2063                 if (obj->oo_hl_head != NULL) {
2064                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2065                         obj->oo_hl_head = NULL;
2066                 }
2067                 result = PTR_ERR(inode);
2068         }
2069         LINVRNT(osd_invariant(obj));
2070         return result;
2071 }
2072
2073 enum {
2074         OSD_NAME_LEN = 255
2075 };
2076
2077 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2078                      struct lu_attr *attr,
2079                      struct dt_allocation_hint *hint,
2080                      struct dt_object_format *dof,
2081                      struct thandle *th)
2082 {
2083         int result;
2084         struct osd_thandle *oth;
2085         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
2086
2087         LASSERT(S_ISDIR(attr->la_mode));
2088
2089         oth = container_of(th, struct osd_thandle, ot_super);
2090         LASSERT(oth->ot_handle->h_transaction != NULL);
2091         result = osd_mkfile(info, obj, mode, hint, th);
2092
2093         return result;
2094 }
2095
2096 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2097                         struct lu_attr *attr,
2098                         struct dt_allocation_hint *hint,
2099                         struct dt_object_format *dof,
2100                         struct thandle *th)
2101 {
2102         int result;
2103         struct osd_thandle *oth;
2104         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2105
2106         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2107
2108         LASSERT(S_ISREG(attr->la_mode));
2109
2110         oth = container_of(th, struct osd_thandle, ot_super);
2111         LASSERT(oth->ot_handle->h_transaction != NULL);
2112
2113         result = osd_mkfile(info, obj, mode, hint, th);
2114         if (result == 0) {
2115                 LASSERT(obj->oo_inode != NULL);
2116                 if (feat->dif_flags & DT_IND_VARKEY)
2117                         result = iam_lvar_create(obj->oo_inode,
2118                                                  feat->dif_keysize_max,
2119                                                  feat->dif_ptrsize,
2120                                                  feat->dif_recsize_max,
2121                                                  oth->ot_handle);
2122                 else
2123                         result = iam_lfix_create(obj->oo_inode,
2124                                                  feat->dif_keysize_max,
2125                                                  feat->dif_ptrsize,
2126                                                  feat->dif_recsize_max,
2127                                                  oth->ot_handle);
2128
2129         }
2130         return result;
2131 }
2132
2133 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2134                      struct lu_attr *attr,
2135                      struct dt_allocation_hint *hint,
2136                      struct dt_object_format *dof,
2137                      struct thandle *th)
2138 {
2139         LASSERT(S_ISREG(attr->la_mode));
2140         return osd_mkfile(info, obj, (attr->la_mode &
2141                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2142 }
2143
2144 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2145                      struct lu_attr *attr,
2146                      struct dt_allocation_hint *hint,
2147                      struct dt_object_format *dof,
2148                      struct thandle *th)
2149 {
2150         LASSERT(S_ISLNK(attr->la_mode));
2151         return osd_mkfile(info, obj, (attr->la_mode &
2152                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2153 }
2154
2155 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2156                      struct lu_attr *attr,
2157                      struct dt_allocation_hint *hint,
2158                      struct dt_object_format *dof,
2159                      struct thandle *th)
2160 {
2161         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2162         int result;
2163
2164         LINVRNT(osd_invariant(obj));
2165         LASSERT(obj->oo_inode == NULL);
2166         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2167                 S_ISFIFO(mode) || S_ISSOCK(mode));
2168
2169         result = osd_mkfile(info, obj, mode, hint, th);
2170         if (result == 0) {
2171                 LASSERT(obj->oo_inode != NULL);
2172                 /*
2173                  * This inode should be marked dirty for i_rdev.  Currently
2174                  * that is done in the osd_attr_init().
2175                  */
2176                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2177                                    attr->la_rdev);
2178         }
2179         LINVRNT(osd_invariant(obj));
2180         return result;
2181 }
2182
2183 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2184                               struct lu_attr *,
2185                               struct dt_allocation_hint *hint,
2186                               struct dt_object_format *dof,
2187                               struct thandle *);
2188
2189 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2190 {
2191         osd_obj_type_f result;
2192
2193         switch (type) {
2194         case DFT_DIR:
2195                 result = osd_mkdir;
2196                 break;
2197         case DFT_REGULAR:
2198                 result = osd_mkreg;
2199                 break;
2200         case DFT_SYM:
2201                 result = osd_mksym;
2202                 break;
2203         case DFT_NODE:
2204                 result = osd_mknod;
2205                 break;
2206         case DFT_INDEX:
2207                 result = osd_mk_index;
2208                 break;
2209
2210         default:
2211                 LBUG();
2212                 break;
2213         }
2214         return result;
2215 }
2216
2217
2218 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2219                         struct dt_object *parent, struct dt_object *child,
2220                         umode_t child_mode)
2221 {
2222         LASSERT(ah);
2223
2224         ah->dah_parent = parent;
2225         ah->dah_mode = child_mode;
2226 }
2227
2228 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2229                           struct lu_attr *attr, struct dt_object_format *dof)
2230 {
2231         struct inode   *inode = obj->oo_inode;
2232         __u64           valid = attr->la_valid;
2233         int             result;
2234
2235         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2236
2237         if (dof->dof_type != DFT_NODE)
2238                 attr->la_valid &= ~LA_RDEV;
2239         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2240                 attr->la_valid &= ~LA_ATIME;
2241         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2242                 attr->la_valid &= ~LA_CTIME;
2243         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2244                 attr->la_valid &= ~LA_MTIME;
2245
2246         result = osd_quota_transfer(inode, attr);
2247         if (result)
2248                 return;
2249
2250         if (attr->la_valid != 0) {
2251                 result = osd_inode_setattr(info->oti_env, inode, attr);
2252                 /*
2253                  * The osd_inode_setattr() should always succeed here.  The
2254                  * only error that could be returned is EDQUOT when we are
2255                  * trying to change the UID or GID of the inode. However, this
2256                  * should not happen since quota enforcement is no longer
2257                  * enabled on ldiskfs (lquota takes care of it).
2258                  */
2259                 LASSERTF(result == 0, "%d\n", result);
2260                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2261         }
2262
2263         attr->la_valid = valid;
2264 }
2265
2266 /**
2267  * Helper function for osd_object_create()
2268  *
2269  * \retval 0, on success
2270  */
2271 static int __osd_object_create(struct osd_thread_info *info,
2272                                struct osd_object *obj, struct lu_attr *attr,
2273                                struct dt_allocation_hint *hint,
2274                                struct dt_object_format *dof,
2275                                struct thandle *th)
2276 {
2277         int     result;
2278         __u32   umask;
2279
2280         /* we drop umask so that permissions we pass are not affected */
2281         umask = current->fs->umask;
2282         current->fs->umask = 0;
2283
2284         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
2285                                                   th);
2286         if (result == 0) {
2287                 osd_attr_init(info, obj, attr, dof);
2288                 osd_object_init0(obj);
2289                 /* bz 24037 */
2290                 if (obj->oo_inode && (obj->oo_inode->i_state & I_NEW))
2291                         unlock_new_inode(obj->oo_inode);
2292         }
2293
2294         /* restore previous umask value */
2295         current->fs->umask = umask;
2296
2297         return result;
2298 }
2299
2300 /**
2301  * Helper function for osd_object_create()
2302  *
2303  * \retval 0, on success
2304  */
2305 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
2306                            const struct lu_fid *fid, struct thandle *th)
2307 {
2308         struct osd_thread_info *info = osd_oti_get(env);
2309         struct osd_inode_id    *id   = &info->oti_id;
2310         struct osd_device      *osd  = osd_obj2dev(obj);
2311         struct osd_thandle     *oh;
2312
2313         LASSERT(obj->oo_inode != NULL);
2314
2315         oh = container_of0(th, struct osd_thandle, ot_super);
2316         LASSERT(oh->ot_handle);
2317
2318         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
2319         return osd_oi_insert(info, osd, fid, id, oh->ot_handle, OI_CHECK_FLD);
2320 }
2321
2322 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
2323                    obd_seq seq, struct lu_seq_range *range)
2324 {
2325         struct seq_server_site  *ss = osd_seq_site(osd);
2326
2327         if (fid_seq_is_idif(seq)) {
2328                 fld_range_set_ost(range);
2329                 range->lsr_index = idif_ost_idx(seq);
2330                 return 0;
2331         }
2332
2333         if (!fid_seq_in_fldb(seq)) {
2334                 fld_range_set_mdt(range);
2335                 if (ss != NULL)
2336                         /* FIXME: If ss is NULL, it suppose not get lsr_index
2337                          * at all */
2338                         range->lsr_index = ss->ss_node_id;
2339                 return 0;
2340         }
2341
2342         LASSERT(ss != NULL);
2343         fld_range_set_any(range);
2344         /* OSD will only do local fld lookup */
2345         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
2346 }
2347
2348 /*
2349  * Concurrency: no external locking is necessary.
2350  */
2351 static int osd_declare_object_create(const struct lu_env *env,
2352                                      struct dt_object *dt,
2353                                      struct lu_attr *attr,
2354                                      struct dt_allocation_hint *hint,
2355                                      struct dt_object_format *dof,
2356                                      struct thandle *handle)
2357 {
2358         struct osd_thandle      *oh;
2359         int                      rc;
2360         ENTRY;
2361
2362         LASSERT(handle != NULL);
2363
2364         oh = container_of0(handle, struct osd_thandle, ot_super);
2365         LASSERT(oh->ot_handle == NULL);
2366
2367         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
2368                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
2369         /* Reuse idle OI block may cause additional one OI block
2370          * to be changed. */
2371         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2372                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
2373
2374         /* If this is directory, then we expect . and .. to be inserted as
2375          * well. The one directory block always needs to be created for the
2376          * directory, so we could use DTO_WRITE_BASE here (GDT, block bitmap,
2377          * block), there is no danger of needing a tree for the first block.
2378          */
2379         if (attr && S_ISDIR(attr->la_mode)) {
2380                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2381                                      osd_dto_credits_noquota[DTO_WRITE_BASE]);
2382                 osd_trans_declare_op(env, oh, OSD_OT_INSERT, 0);
2383         }
2384
2385         if (!attr)
2386                 RETURN(0);
2387
2388         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
2389                                    osd_dt_obj(dt), false, NULL, false);
2390         if (rc != 0)
2391                 RETURN(rc);
2392
2393         RETURN(rc);
2394 }
2395
2396 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
2397                              struct lu_attr *attr,
2398                              struct dt_allocation_hint *hint,
2399                              struct dt_object_format *dof, struct thandle *th)
2400 {
2401         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
2402         struct osd_object       *obj    = osd_dt_obj(dt);
2403         struct osd_thread_info  *info   = osd_oti_get(env);
2404         int result;
2405         ENTRY;
2406
2407         LINVRNT(osd_invariant(obj));
2408         LASSERT(!dt_object_exists(dt));
2409         LASSERT(!dt_object_remote(dt));
2410         LASSERT(osd_write_locked(env, obj));
2411         LASSERT(th != NULL);
2412
2413         if (unlikely(fid_is_acct(fid)))
2414                 /* Quota files can't be created from the kernel any more,
2415                  * 'tune2fs -O quota' will take care of creating them */
2416                 RETURN(-EPERM);
2417
2418         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2419         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2420
2421         result = __osd_object_create(info, obj, attr, hint, dof, th);
2422         if (result == 0)
2423                 result = __osd_oi_insert(env, obj, fid, th);
2424
2425         LASSERT(ergo(result == 0,
2426                      dt_object_exists(dt) && !dt_object_remote(dt)));
2427
2428         LASSERT(osd_invariant(obj));
2429         RETURN(result);
2430 }
2431
2432 /**
2433  * Called to destroy on-disk representation of the object
2434  *
2435  * Concurrency: must be locked
2436  */
2437 static int osd_declare_object_destroy(const struct lu_env *env,
2438                                       struct dt_object *dt,
2439                                       struct thandle *th)
2440 {
2441         struct osd_object  *obj = osd_dt_obj(dt);
2442         struct inode       *inode = obj->oo_inode;
2443         struct osd_thandle *oh;
2444         int                 rc;
2445         ENTRY;
2446
2447         oh = container_of0(th, struct osd_thandle, ot_super);
2448         LASSERT(oh->ot_handle == NULL);
2449         LASSERT(inode);
2450
2451         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
2452                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
2453         /* Recycle idle OI leaf may cause additional three OI blocks
2454          * to be changed. */
2455         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
2456                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
2457         /* one less inode */
2458         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2459                                    -1, oh, obj, false, NULL, false);
2460         if (rc)
2461                 RETURN(rc);
2462         /* data to be truncated */
2463         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2464                                    0, oh, obj, true, NULL, false);
2465         RETURN(rc);
2466 }
2467
2468 static int osd_object_destroy(const struct lu_env *env,
2469                               struct dt_object *dt,
2470                               struct thandle *th)
2471 {
2472         const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
2473         struct osd_object      *obj = osd_dt_obj(dt);
2474         struct inode           *inode = obj->oo_inode;
2475         struct osd_device      *osd = osd_obj2dev(obj);
2476         struct osd_thandle     *oh;
2477         int                     result;
2478         ENTRY;
2479
2480         oh = container_of0(th, struct osd_thandle, ot_super);
2481         LASSERT(oh->ot_handle);
2482         LASSERT(inode);
2483         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
2484
2485         if (unlikely(fid_is_acct(fid)))
2486                 RETURN(-EPERM);
2487
2488         if (S_ISDIR(inode->i_mode)) {
2489                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
2490                         inode->i_nlink == 2);
2491                 /* it will check/delete the inode from remote parent,
2492                  * how to optimize it? unlink performance impaction XXX */
2493                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
2494                 if (result != 0 && result != -ENOENT) {
2495                         CERROR("%s: delete inode "DFID": rc = %d\n",
2496                                osd_name(osd), PFID(fid), result);
2497                 }
2498                 spin_lock(&obj->oo_guard);
2499                 clear_nlink(inode);
2500                 spin_unlock(&obj->oo_guard);
2501                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2502         }
2503
2504         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
2505
2506         result = osd_oi_delete(osd_oti_get(env), osd, fid, oh->ot_handle,
2507                                OI_CHECK_FLD);
2508
2509         /* XXX: add to ext3 orphan list */
2510         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
2511
2512         /* not needed in the cache anymore */
2513         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
2514
2515         RETURN(0);
2516 }
2517
2518 /**
2519  * Put the fid into lustre_mdt_attrs, and then place the structure
2520  * inode's ea. This fid should not be altered during the life time
2521  * of the inode.
2522  *
2523  * \retval +ve, on success
2524  * \retval -ve, on error
2525  *
2526  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
2527  */
2528 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
2529                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
2530 {
2531         struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
2532         int                      rc;
2533         ENTRY;
2534
2535         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
2536                 RETURN(0);
2537
2538         lustre_lma_init(lma, fid, compat, incompat);
2539         lustre_lma_swab(lma);
2540
2541         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
2542                              XATTR_CREATE);
2543         /* LMA may already exist, but we need to check that all the
2544          * desired compat/incompat flags have been added. */
2545         if (unlikely(rc == -EEXIST)) {
2546                 if (compat == 0 && incompat == 0)
2547                         RETURN(0);
2548
2549                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
2550                                      XATTR_NAME_LMA, info->oti_mdt_attrs_old,
2551                                      LMA_OLD_SIZE);
2552                 if (rc <= 0)
2553                         RETURN(-EINVAL);
2554
2555                 lustre_lma_swab(lma);
2556                 if (!(~lma->lma_compat & compat) &&
2557                     !(~lma->lma_incompat & incompat))
2558                         RETURN(0);
2559
2560                 lma->lma_compat |= compat;
2561                 lma->lma_incompat |= incompat;
2562                 lustre_lma_swab(lma);
2563                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
2564                                      sizeof(*lma), XATTR_REPLACE);
2565         }
2566
2567         RETURN(rc);
2568 }
2569
2570 /**
2571  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
2572  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
2573  * To have compatilibility with 1.8 ldiskfs driver we need to have
2574  * magic number at start of fid data.
2575  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
2576  * its inmemory API.
2577  */
2578 void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
2579                                   const struct lu_fid *fid)
2580 {
2581         if (!fid_is_namespace_visible(fid) ||
2582             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
2583                 param->edp_magic = 0;
2584                 return;
2585         }
2586
2587         param->edp_magic = LDISKFS_LUFID_MAGIC;
2588         param->edp_len =  sizeof(struct lu_fid) + 1;
2589         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
2590 }
2591
2592 /**
2593  * Try to read the fid from inode ea into dt_rec.
2594  *
2595  * \param fid object fid.
2596  *
2597  * \retval 0 on success
2598  */
2599 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
2600                           __u32 ino, struct lu_fid *fid,
2601                           struct osd_inode_id *id)
2602 {
2603         struct osd_thread_info *info  = osd_oti_get(env);
2604         struct inode           *inode;
2605         ENTRY;
2606
2607         osd_id_gen(id, ino, OSD_OII_NOGEN);
2608         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
2609         if (IS_ERR(inode))
2610                 RETURN(PTR_ERR(inode));
2611
2612         iput(inode);
2613         RETURN(0);
2614 }
2615
2616 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
2617                                         struct inode *dir,
2618                                         struct inode *parent_dir,
2619                                         const struct lu_fid *dot_fid,
2620                                         const struct lu_fid *dot_dot_fid,
2621                                         struct osd_thandle *oth)
2622 {
2623         struct ldiskfs_dentry_param *dot_ldp;
2624         struct ldiskfs_dentry_param *dot_dot_ldp;
2625
2626         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
2627         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
2628
2629         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
2630         dot_ldp->edp_magic = 0;
2631         return ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
2632                                         dir, dot_ldp, dot_dot_ldp);
2633 }
2634
2635 /**
2636  * Create an local agent inode for remote entry
2637  */
2638 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
2639                                                   struct osd_device *osd,
2640                                                   struct osd_object *pobj,
2641                                                   const struct lu_fid *fid,
2642                                                   __u32 type,
2643                                                   struct thandle *th)
2644 {
2645         struct osd_thread_info  *info = osd_oti_get(env);
2646         struct inode            *local;
2647         struct osd_thandle      *oh;
2648         int                     rc;
2649         ENTRY;
2650
2651         LASSERT(th);
2652         oh = container_of(th, struct osd_thandle, ot_super);
2653         LASSERT(oh->ot_handle->h_transaction != NULL);
2654
2655         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
2656         if (IS_ERR(local)) {
2657                 CERROR("%s: create local error %d\n", osd_name(osd),
2658                        (int)PTR_ERR(local));
2659                 RETURN(local);
2660         }
2661
2662         /* Set special LMA flag for local agent inode */
2663         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
2664         if (rc != 0) {
2665                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
2666                        osd_name(osd), PFID(fid), rc);
2667                 RETURN(ERR_PTR(rc));
2668         }
2669
2670         if (!S_ISDIR(type))
2671                 RETURN(local);
2672
2673         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
2674                                          lu_object_fid(&pobj->oo_dt.do_lu),
2675                                          fid, oh);
2676         if (rc != 0) {
2677                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
2678                         osd_name(osd), PFID(fid), rc);
2679                 RETURN(ERR_PTR(rc));
2680         }
2681
2682         RETURN(local);
2683 }
2684
2685 /**
2686  * Delete local agent inode for remote entry
2687  */
2688 static int osd_delete_local_agent_inode(const struct lu_env *env,
2689                                         struct osd_device *osd,
2690                                         const struct lu_fid *fid,
2691                                         __u32 ino, struct osd_thandle *oh)
2692 {
2693         struct osd_thread_info  *oti = osd_oti_get(env);
2694         struct osd_inode_id     *id = &oti->oti_id;
2695         struct inode            *inode;
2696         ENTRY;
2697
2698         id->oii_ino = le32_to_cpu(ino);
2699         id->oii_gen = OSD_OII_NOGEN;
2700         inode = osd_iget(oti, osd, id);
2701         if (IS_ERR(inode)) {
2702                 CERROR("%s: iget error "DFID" id %u:%u\n", osd_name(osd),
2703                        PFID(fid), id->oii_ino, id->oii_gen);
2704                 RETURN(PTR_ERR(inode));
2705         }
2706
2707         clear_nlink(inode);
2708         mark_inode_dirty(inode);
2709         CDEBUG(D_INODE, "%s: delete remote inode "DFID" %lu\n",
2710                 osd_name(osd), PFID(fid), inode->i_ino);
2711         iput(inode);
2712         RETURN(0);
2713 }
2714
2715 /**
2716  * OSD layer object create function for interoperability mode (b11826).
2717  * This is mostly similar to osd_object_create(). Only difference being, fid is
2718  * inserted into inode ea here.
2719  *
2720  * \retval   0, on success
2721  * \retval -ve, on error
2722  */
2723 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
2724                                 struct lu_attr *attr,
2725                                 struct dt_allocation_hint *hint,
2726                                 struct dt_object_format *dof,
2727                                 struct thandle *th)
2728 {
2729         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
2730         struct osd_object       *obj    = osd_dt_obj(dt);
2731         struct osd_thread_info  *info   = osd_oti_get(env);
2732         int                      result;
2733
2734         ENTRY;
2735
2736         LASSERT(osd_invariant(obj));
2737         LASSERT(!dt_object_exists(dt));
2738         LASSERT(!dt_object_remote(dt));
2739         LASSERT(osd_write_locked(env, obj));
2740         LASSERT(th != NULL);
2741
2742         if (unlikely(fid_is_acct(fid)))
2743                 /* Quota files can't be created from the kernel any more,
2744                  * 'tune2fs -O quota' will take care of creating them */
2745                 RETURN(-EPERM);
2746
2747         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2748         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2749
2750         result = __osd_object_create(info, obj, attr, hint, dof, th);
2751         if (result == 0)
2752                 result = osd_ea_fid_set(info, obj->oo_inode, fid,
2753                                 fid_is_on_ost(info, osd_obj2dev(obj),
2754                                               fid, OI_CHECK_FLD) ?
2755                                 LMAC_FID_ON_OST : 0, 0);
2756
2757         if (result == 0)
2758                 result = __osd_oi_insert(env, obj, fid, th);
2759
2760         LASSERT(ergo(result == 0,
2761                      dt_object_exists(dt) && !dt_object_remote(dt)));
2762         LINVRNT(osd_invariant(obj));
2763         RETURN(result);
2764 }
2765
2766 static int osd_declare_object_ref_add(const struct lu_env *env,
2767                                       struct dt_object *dt,
2768                                       struct thandle *handle)
2769 {
2770         struct osd_thandle       *oh;
2771
2772         /* it's possible that object doesn't exist yet */
2773         LASSERT(handle != NULL);
2774
2775         oh = container_of0(handle, struct osd_thandle, ot_super);
2776         LASSERT(oh->ot_handle == NULL);
2777
2778         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
2779                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2780
2781         return 0;
2782 }
2783
2784 /*
2785  * Concurrency: @dt is write locked.
2786  */
2787 static int osd_object_ref_add(const struct lu_env *env,
2788                               struct dt_object *dt, struct thandle *th)
2789 {
2790         struct osd_object  *obj = osd_dt_obj(dt);
2791         struct inode       *inode = obj->oo_inode;
2792         struct osd_thandle *oh;
2793         int                 rc = 0;
2794
2795         LINVRNT(osd_invariant(obj));
2796         LASSERT(dt_object_exists(dt));
2797         LASSERT(!dt_object_remote(dt));
2798         LASSERT(osd_write_locked(env, obj));
2799         LASSERT(th != NULL);
2800
2801         oh = container_of0(th, struct osd_thandle, ot_super);
2802         LASSERT(oh->ot_handle != NULL);
2803
2804         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
2805
2806         CDEBUG(D_INODE, DFID" increase nlink %d\n",
2807                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2808         /*
2809          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
2810          * (65000) subdirectories by storing "1" in i_nlink if the link count
2811          * would otherwise overflow. Directory tranversal tools understand
2812          * that (st_nlink == 1) indicates that the filesystem dose not track
2813          * hard links count on the directory, and will not abort subdirectory
2814          * scanning early once (st_nlink - 2) subdirs have been found.
2815          *
2816          * This also has to properly handle the case of inodes with nlink == 0
2817          * in case they are being linked into the PENDING directory
2818          */
2819         spin_lock(&obj->oo_guard);
2820         if (unlikely(inode->i_nlink == 0))
2821                 /* inc_nlink from 0 may cause WARN_ON */
2822                 set_nlink(inode, 1);
2823         else {
2824                 ldiskfs_inc_count(oh->ot_handle, inode);
2825                 if (!S_ISDIR(inode->i_mode))
2826                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
2827         }
2828         spin_unlock(&obj->oo_guard);
2829
2830         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2831         LINVRNT(osd_invariant(obj));
2832
2833         return rc;
2834 }
2835
2836 static int osd_declare_object_ref_del(const struct lu_env *env,
2837                                       struct dt_object *dt,
2838                                       struct thandle *handle)
2839 {
2840         struct osd_thandle *oh;
2841
2842         LASSERT(dt_object_exists(dt));
2843         LASSERT(!dt_object_remote(dt));
2844         LASSERT(handle != NULL);
2845
2846         oh = container_of0(handle, struct osd_thandle, ot_super);
2847         LASSERT(oh->ot_handle == NULL);
2848
2849         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
2850                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2851
2852         return 0;
2853 }
2854
2855 /*
2856  * Concurrency: @dt is write locked.
2857  */
2858 static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
2859                               struct thandle *th)
2860 {
2861         struct osd_object       *obj = osd_dt_obj(dt);
2862         struct inode            *inode = obj->oo_inode;
2863         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
2864         struct osd_thandle      *oh;
2865
2866         LINVRNT(osd_invariant(obj));
2867         LASSERT(dt_object_exists(dt));
2868         LASSERT(!dt_object_remote(dt));
2869         LASSERT(osd_write_locked(env, obj));
2870         LASSERT(th != NULL);
2871
2872         oh = container_of0(th, struct osd_thandle, ot_super);
2873         LASSERT(oh->ot_handle != NULL);
2874
2875         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
2876
2877         spin_lock(&obj->oo_guard);
2878         /* That can be result of upgrade from old Lustre version and
2879          * applied only to local files.  Just skip this ref_del call.
2880          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
2881         if (inode->i_nlink == 0) {
2882                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
2883                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
2884                              ", maybe an upgraded file? (LU-3915)\n",
2885                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
2886                 spin_unlock(&obj->oo_guard);
2887                 return 0;
2888         }
2889
2890         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
2891                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2892
2893         ldiskfs_dec_count(oh->ot_handle, inode);
2894         spin_unlock(&obj->oo_guard);
2895
2896         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2897         LINVRNT(osd_invariant(obj));
2898
2899         return 0;
2900 }
2901
2902 /*
2903  * Get the 64-bit version for an inode.
2904  */
2905 static int osd_object_version_get(const struct lu_env *env,
2906                                   struct dt_object *dt, dt_obj_version_t *ver)
2907 {
2908         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2909
2910         CDEBUG(D_INODE, "Get version "LPX64" for inode %lu\n",
2911                LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2912         *ver = LDISKFS_I(inode)->i_fs_version;
2913         return 0;
2914 }
2915
2916 /*
2917  * Concurrency: @dt is read locked.
2918  */
2919 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
2920                          struct lu_buf *buf, const char *name,
2921                          struct lustre_capa *capa)
2922 {
2923         struct osd_object      *obj    = osd_dt_obj(dt);
2924         struct inode           *inode  = obj->oo_inode;
2925         struct osd_thread_info *info   = osd_oti_get(env);
2926         struct dentry          *dentry = &info->oti_obj_dentry;
2927
2928         /* version get is not real XATTR but uses xattr API */
2929         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2930                 /* for version we are just using xattr API but change inode
2931                  * field instead */
2932                 if (buf->lb_len == 0)
2933                         return sizeof(dt_obj_version_t);
2934
2935                 if (buf->lb_len < sizeof(dt_obj_version_t))
2936                         return -ERANGE;
2937
2938                 osd_object_version_get(env, dt, buf->lb_buf);
2939
2940                 return sizeof(dt_obj_version_t);
2941         }
2942
2943         LASSERT(dt_object_exists(dt));
2944         LASSERT(!dt_object_remote(dt));
2945         LASSERT(inode->i_op != NULL);
2946         LASSERT(inode->i_op->getxattr != NULL);
2947
2948         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
2949                 return -EACCES;
2950
2951         return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
2952 }
2953
2954
2955 static int osd_declare_xattr_set(const struct lu_env *env,
2956                                  struct dt_object *dt,
2957                                  const struct lu_buf *buf, const char *name,
2958                                  int fl, struct thandle *handle)
2959 {
2960         struct osd_thandle *oh;
2961         int credits;
2962         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
2963
2964         LASSERT(handle != NULL);
2965
2966         oh = container_of0(handle, struct osd_thandle, ot_super);
2967         LASSERT(oh->ot_handle == NULL);
2968
2969         /* optimistic optimization: LMA is set first and usually fit inode */
2970         if (strcmp(name, XATTR_NAME_LMA) == 0) {
2971                 if (dt_object_exists(dt))
2972                         credits = 0;
2973                 else
2974                         credits = 1;
2975         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2976                 credits = 1;
2977         } else {
2978                 credits = osd_dto_credits_noquota[DTO_XATTR_SET];
2979                 if (buf && buf->lb_len > sb->s_blocksize) {
2980                         credits *= (buf->lb_len + sb->s_blocksize - 1) >>
2981                                         sb->s_blocksize_bits;
2982                 }
2983                 /*
2984                  * xattr set may involve inode quota change, reserve credits for
2985                  * dquot_initialize()
2986                  */
2987                 oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
2988         }
2989
2990         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
2991
2992         return 0;
2993 }
2994
2995 /*
2996  * Set the 64-bit version for object
2997  */
2998 static void osd_object_version_set(const struct lu_env *env,
2999                                    struct dt_object *dt,
3000                                    dt_obj_version_t *new_version)
3001 {
3002         struct inode *inode = osd_dt_obj(dt)->oo_inode;
3003
3004         CDEBUG(D_INODE, "Set version "LPX64" (old "LPX64") for inode %lu\n",
3005                *new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
3006
3007         LDISKFS_I(inode)->i_fs_version = *new_version;
3008         /** Version is set after all inode operations are finished,
3009          *  so we should mark it dirty here */
3010         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3011 }
3012
3013 /*
3014  * Concurrency: @dt is write locked.
3015  */
3016 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
3017                          const struct lu_buf *buf, const char *name, int fl,
3018                          struct thandle *handle, struct lustre_capa *capa)
3019 {
3020         struct osd_object      *obj      = osd_dt_obj(dt);
3021         struct inode           *inode    = obj->oo_inode;
3022         struct osd_thread_info *info     = osd_oti_get(env);
3023         int                     fs_flags = 0;
3024         ENTRY;
3025
3026         LASSERT(handle != NULL);
3027
3028         /* version set is not real XATTR */
3029         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3030                 /* for version we are just using xattr API but change inode
3031                  * field instead */
3032                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
3033                 osd_object_version_set(env, dt, buf->lb_buf);
3034                 return sizeof(dt_obj_version_t);
3035         }
3036
3037         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
3038                 return -EACCES;
3039
3040         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
3041                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
3042
3043         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3044         if (fl & LU_XATTR_REPLACE)
3045                 fs_flags |= XATTR_REPLACE;
3046
3047         if (fl & LU_XATTR_CREATE)
3048                 fs_flags |= XATTR_CREATE;
3049
3050         if (strcmp(name, XATTR_NAME_LMV) == 0) {
3051                 struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
3052                 int                      rc;
3053
3054                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
3055                 if (rc != 0)
3056                         RETURN(rc);
3057
3058                 lma->lma_incompat |= LMAI_STRIPED;
3059                 lustre_lma_swab(lma);
3060                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3061                                      sizeof(*lma), XATTR_REPLACE);
3062                 if (rc != 0)
3063                         RETURN(rc);
3064         }
3065
3066         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_OVERFLOW) &&
3067             strcmp(name, XATTR_NAME_LINK) == 0)
3068                 return -ENOSPC;
3069
3070         return __osd_xattr_set(info, inode, name, buf->lb_buf, buf->lb_len,
3071                                fs_flags);
3072 }
3073
3074 /*
3075  * Concurrency: @dt is read locked.
3076  */
3077 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
3078                           struct lu_buf *buf, struct lustre_capa *capa)
3079 {
3080         struct osd_object      *obj    = osd_dt_obj(dt);
3081         struct inode           *inode  = obj->oo_inode;
3082         struct osd_thread_info *info   = osd_oti_get(env);
3083         struct dentry          *dentry = &info->oti_obj_dentry;
3084
3085         LASSERT(dt_object_exists(dt));
3086         LASSERT(!dt_object_remote(dt));
3087         LASSERT(inode->i_op != NULL);
3088         LASSERT(inode->i_op->listxattr != NULL);
3089
3090         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
3091                 return -EACCES;
3092
3093         dentry->d_inode = inode;
3094         dentry->d_sb = inode->i_sb;
3095         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
3096 }
3097
3098 static int osd_declare_xattr_del(const struct lu_env *env,
3099                                  struct dt_object *dt, const char *name,
3100                                  struct thandle *handle)
3101 {
3102         struct osd_thandle *oh;
3103         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
3104
3105         LASSERT(dt_object_exists(dt));
3106         LASSERT(!dt_object_remote(dt));
3107         LASSERT(handle != NULL);
3108
3109         oh = container_of0(handle, struct osd_thandle, ot_super);
3110         LASSERT(oh->ot_handle == NULL);
3111
3112         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
3113                              osd_dto_credits_noquota[DTO_XATTR_SET]);
3114         /*
3115          * xattr del may involve inode quota change, reserve credits for
3116          * dquot_initialize()
3117          */
3118         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
3119
3120         return 0;
3121 }
3122
3123 /*
3124  * Concurrency: @dt is write locked.
3125  */
3126 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
3127                          const char *name, struct thandle *handle,
3128                          struct lustre_capa *capa)
3129 {
3130         struct osd_object      *obj    = osd_dt_obj(dt);
3131         struct inode           *inode  = obj->oo_inode;
3132         struct osd_thread_info *info   = osd_oti_get(env);
3133         struct dentry          *dentry = &info->oti_obj_dentry;
3134         int                     rc;
3135
3136         LASSERT(dt_object_exists(dt));
3137         LASSERT(!dt_object_remote(dt));
3138         LASSERT(inode->i_op != NULL);
3139         LASSERT(inode->i_op->removexattr != NULL);
3140         LASSERT(handle != NULL);
3141
3142         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
3143                 return -EACCES;
3144
3145         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3146
3147         ll_vfs_dq_init(inode);
3148         dentry->d_inode = inode;
3149         dentry->d_sb = inode->i_sb;
3150         rc = inode->i_op->removexattr(dentry, name);
3151         return rc;
3152 }
3153
3154 static struct obd_capa *osd_capa_get(const struct lu_env *env,
3155                                      struct dt_object *dt,
3156                                      struct lustre_capa *old, __u64 opc)
3157 {
3158         struct osd_thread_info *info = osd_oti_get(env);
3159         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3160         struct osd_object *obj = osd_dt_obj(dt);
3161         struct osd_device *osd = osd_obj2dev(obj);
3162         struct lustre_capa_key *key = &info->oti_capa_key;
3163         struct lustre_capa *capa = &info->oti_capa;
3164         struct obd_capa *oc;
3165         struct lu_capainfo *lci;
3166         int rc;
3167         ENTRY;
3168
3169         if (!osd->od_fl_capa)
3170                 RETURN(ERR_PTR(-ENOENT));
3171
3172         LASSERT(dt_object_exists(dt));
3173         LASSERT(!dt_object_remote(dt));
3174         LINVRNT(osd_invariant(obj));
3175
3176         /* renewal sanity check */
3177         if (old && osd_object_auth(env, dt, old, opc))
3178                 RETURN(ERR_PTR(-EACCES));
3179
3180         lci = lu_capainfo_get(env);
3181         if (unlikely(lci == NULL))
3182                 RETURN(ERR_PTR(-ENOENT));
3183
3184         switch (lci->lci_auth) {
3185         case LC_ID_NONE:
3186                 RETURN(NULL);
3187         case LC_ID_PLAIN:
3188                 capa->lc_uid = i_uid_read(obj->oo_inode);
3189                 capa->lc_gid = i_gid_read(obj->oo_inode);
3190                 capa->lc_flags = LC_ID_PLAIN;
3191                 break;
3192         case LC_ID_CONVERT: {
3193                 __u32 d[4], s[4];
3194
3195                 s[0] = i_uid_read(obj->oo_inode);
3196                 cfs_get_random_bytes(&(s[1]), sizeof(__u32));
3197                 s[2] = i_uid_read(obj->oo_inode);
3198                 cfs_get_random_bytes(&(s[3]), sizeof(__u32));
3199                 rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
3200                 if (unlikely(rc))
3201                         RETURN(ERR_PTR(rc));
3202
3203                 capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
3204                 capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
3205                 capa->lc_flags = LC_ID_CONVERT;
3206                 break;
3207         }
3208         default:
3209                 RETURN(ERR_PTR(-EINVAL));
3210         }
3211
3212         capa->lc_fid = *fid;
3213         capa->lc_opc = opc;
3214         capa->lc_flags |= osd->od_capa_alg << 24;
3215         capa->lc_timeout = osd->od_capa_timeout;
3216         capa->lc_expiry = 0;
3217
3218         oc = capa_lookup(osd->od_capa_hash, capa, 1);
3219         if (oc) {
3220                 LASSERT(!capa_is_expired(oc));
3221                 RETURN(oc);
3222         }
3223
3224         spin_lock(&capa_lock);
3225         *key = osd->od_capa_keys[1];
3226         spin_unlock(&capa_lock);
3227
3228         capa->lc_keyid = key->lk_keyid;
3229         capa->lc_expiry = cfs_time_current_sec() + osd->od_capa_timeout;
3230
3231         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
3232         if (rc) {
3233                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
3234                 RETURN(ERR_PTR(rc));
3235         }
3236
3237         oc = capa_add(osd->od_capa_hash, capa);
3238         RETURN(oc);
3239 }
3240
3241 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
3242                            __u64 start, __u64 end)
3243 {
3244         struct osd_object       *obj    = osd_dt_obj(dt);
3245         struct inode            *inode  = obj->oo_inode;
3246         struct osd_thread_info  *info   = osd_oti_get(env);
3247         struct dentry           *dentry = &info->oti_obj_dentry;
3248         struct file             *file   = &info->oti_file;
3249         int                     rc;
3250
3251         ENTRY;
3252
3253         dentry->d_inode = inode;
3254         dentry->d_sb = inode->i_sb;
3255         file->f_dentry = dentry;
3256         file->f_mapping = inode->i_mapping;
3257         file->f_op = inode->i_fop;
3258         set_file_inode(file, inode);
3259
3260 #ifdef HAVE_FILE_FSYNC_4ARGS
3261         rc = file->f_op->fsync(file, start, end, 0);
3262 #elif defined(HAVE_FILE_FSYNC_2ARGS)
3263         mutex_lock(&inode->i_mutex);
3264         rc = file->f_op->fsync(file, 0);
3265         mutex_unlock(&inode->i_mutex);
3266 #else
3267         mutex_lock(&inode->i_mutex);
3268         rc = file->f_op->fsync(file, dentry, 0);
3269         mutex_unlock(&inode->i_mutex);
3270 #endif
3271
3272         RETURN(rc);
3273 }
3274
3275 static int osd_data_get(const struct lu_env *env, struct dt_object *dt,
3276                         void **data)
3277 {
3278         struct osd_object *obj = osd_dt_obj(dt);
3279         ENTRY;
3280
3281         *data = (void *)obj->oo_inode;
3282         RETURN(0);
3283 }
3284
3285 /*
3286  * Index operations.
3287  */
3288
3289 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
3290                            const struct dt_index_features *feat)
3291 {
3292         struct iam_descr *descr;
3293
3294         if (osd_object_is_root(o))
3295                 return feat == &dt_directory_features;
3296
3297         LASSERT(o->oo_dir != NULL);
3298
3299         descr = o->oo_dir->od_container.ic_descr;
3300         if (feat == &dt_directory_features) {
3301                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
3302                         return 1;
3303                 else
3304                         return 0;
3305         } else {
3306                 return
3307                         feat->dif_keysize_min <= descr->id_key_size &&
3308                         descr->id_key_size <= feat->dif_keysize_max &&
3309                         feat->dif_recsize_min <= descr->id_rec_size &&
3310                         descr->id_rec_size <= feat->dif_recsize_max &&
3311                         !(feat->dif_flags & (DT_IND_VARKEY |
3312                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
3313                         ergo(feat->dif_flags & DT_IND_UPDATE,
3314                              1 /* XXX check that object (and file system) is
3315                                 * writable */);
3316         }
3317 }
3318
3319 static int osd_iam_container_init(const struct lu_env *env,
3320                                   struct osd_object *obj,
3321                                   struct osd_directory *dir)
3322 {
3323         struct iam_container *bag = &dir->od_container;
3324         int result;
3325
3326         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
3327         if (result != 0)
3328                 return result;
3329
3330         result = iam_container_setup(bag);
3331         if (result == 0)
3332                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
3333         else
3334                 iam_container_fini(bag);
3335
3336         return result;
3337 }
3338
3339
3340 /*
3341  * Concurrency: no external locking is necessary.
3342  */
3343 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
3344                          const struct dt_index_features *feat)
3345 {
3346         int                      result;
3347         int                      skip_iam = 0;
3348         struct osd_object       *obj = osd_dt_obj(dt);
3349
3350         LINVRNT(osd_invariant(obj));
3351
3352         if (osd_object_is_root(obj)) {
3353                 dt->do_index_ops = &osd_index_ea_ops;
3354                 result = 0;
3355         } else if (feat == &dt_directory_features) {
3356                 dt->do_index_ops = &osd_index_ea_ops;
3357                 if (obj->oo_inode != NULL && S_ISDIR(obj->oo_inode->i_mode))
3358                         result = 0;
3359                 else
3360                         result = -ENOTDIR;
3361                 skip_iam = 1;
3362         } else if (unlikely(feat == &dt_otable_features)) {
3363                 dt->do_index_ops = &osd_otable_ops;
3364                 return 0;
3365         } else if (unlikely(feat == &dt_acct_features)) {
3366                 dt->do_index_ops = &osd_acct_index_ops;
3367                 result = 0;
3368                 skip_iam = 1;
3369         } else if (!osd_has_index(obj)) {
3370                 struct osd_directory *dir;
3371
3372                 OBD_ALLOC_PTR(dir);
3373                 if (dir != NULL) {
3374
3375                         spin_lock(&obj->oo_guard);
3376                         if (obj->oo_dir == NULL)
3377                                 obj->oo_dir = dir;
3378                         else
3379                                 /*
3380                                  * Concurrent thread allocated container data.
3381                                  */
3382                                 OBD_FREE_PTR(dir);
3383                         spin_unlock(&obj->oo_guard);
3384                         /*
3385                          * Now, that we have container data, serialize its
3386                          * initialization.
3387                          */
3388                         down_write(&obj->oo_ext_idx_sem);
3389                         /*
3390                          * recheck under lock.
3391                          */
3392                         if (!osd_has_index(obj))
3393                                 result = osd_iam_container_init(env, obj,
3394                                                                 obj->oo_dir);
3395                         else
3396                                 result = 0;
3397                         up_write(&obj->oo_ext_idx_sem);
3398                 } else {
3399                         result = -ENOMEM;
3400                 }
3401         } else {
3402                 result = 0;
3403         }
3404
3405         if (result == 0 && skip_iam == 0) {
3406                 if (!osd_iam_index_probe(env, obj, feat))
3407                         result = -ENOTDIR;
3408         }
3409         LINVRNT(osd_invariant(obj));
3410
3411         if (result == 0 && is_quota_glb_feat(feat) &&
3412             fid_seq(lu_object_fid(&dt->do_lu)) == FID_SEQ_QUOTA_GLB)
3413                 result = osd_quota_migration(env, dt, feat);
3414
3415         return result;
3416 }
3417
3418 static int osd_otable_it_attr_get(const struct lu_env *env,
3419                                  struct dt_object *dt,
3420                                  struct lu_attr *attr,
3421                                  struct lustre_capa *capa)
3422 {
3423         attr->la_valid = 0;
3424         return 0;
3425 }
3426
3427 static const struct dt_object_operations osd_obj_ops = {
3428         .do_read_lock         = osd_object_read_lock,
3429         .do_write_lock        = osd_object_write_lock,
3430         .do_read_unlock       = osd_object_read_unlock,
3431         .do_write_unlock      = osd_object_write_unlock,
3432         .do_write_locked      = osd_object_write_locked,
3433         .do_attr_get          = osd_attr_get,
3434         .do_declare_attr_set  = osd_declare_attr_set,
3435         .do_attr_set          = osd_attr_set,
3436         .do_ah_init           = osd_ah_init,
3437         .do_declare_create    = osd_declare_object_create,
3438         .do_create            = osd_object_create,
3439         .do_declare_destroy   = osd_declare_object_destroy,
3440         .do_destroy           = osd_object_destroy,
3441         .do_index_try         = osd_index_try,
3442         .do_declare_ref_add   = osd_declare_object_ref_add,
3443         .do_ref_add           = osd_object_ref_add,
3444         .do_declare_ref_del   = osd_declare_object_ref_del,
3445         .do_ref_del           = osd_object_ref_del,
3446         .do_xattr_get         = osd_xattr_get,
3447         .do_declare_xattr_set = osd_declare_xattr_set,
3448         .do_xattr_set         = osd_xattr_set,
3449         .do_declare_xattr_del = osd_declare_xattr_del,
3450         .do_xattr_del         = osd_xattr_del,
3451         .do_xattr_list        = osd_xattr_list,
3452         .do_capa_get          = osd_capa_get,
3453         .do_object_sync       = osd_object_sync,
3454         .do_data_get          = osd_data_get,
3455 };
3456
3457 /**
3458  * dt_object_operations for interoperability mode
3459  * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
3460  */
3461 static const struct dt_object_operations osd_obj_ea_ops = {
3462         .do_read_lock         = osd_object_read_lock,
3463         .do_write_lock        = osd_object_write_lock,
3464         .do_read_unlock       = osd_object_read_unlock,
3465         .do_write_unlock      = osd_object_write_unlock,
3466         .do_write_locked      = osd_object_write_locked,
3467         .do_attr_get          = osd_attr_get,
3468         .do_declare_attr_set  = osd_declare_attr_set,
3469         .do_attr_set          = osd_attr_set,
3470         .do_ah_init           = osd_ah_init,
3471         .do_declare_create    = osd_declare_object_create,
3472         .do_create            = osd_object_ea_create,
3473         .do_declare_destroy   = osd_declare_object_destroy,
3474         .do_destroy           = osd_object_destroy,
3475         .do_index_try         = osd_index_try,
3476         .do_declare_ref_add   = osd_declare_object_ref_add,
3477         .do_ref_add           = osd_object_ref_add,
3478         .do_declare_ref_del   = osd_declare_object_ref_del,
3479         .do_ref_del           = osd_object_ref_del,
3480         .do_xattr_get         = osd_xattr_get,
3481         .do_declare_xattr_set = osd_declare_xattr_set,
3482         .do_xattr_set         = osd_xattr_set,
3483         .do_declare_xattr_del = osd_declare_xattr_del,
3484         .do_xattr_del         = osd_xattr_del,
3485         .do_xattr_list        = osd_xattr_list,
3486         .do_capa_get          = osd_capa_get,
3487         .do_object_sync       = osd_object_sync,
3488         .do_data_get          = osd_data_get,
3489 };
3490
3491 static const struct dt_object_operations osd_obj_otable_it_ops = {
3492         .do_attr_get    = osd_otable_it_attr_get,
3493         .do_index_try   = osd_index_try,
3494 };
3495
3496 static int osd_index_declare_iam_delete(const struct lu_env *env,
3497                                         struct dt_object *dt,
3498                                         const struct dt_key *key,
3499                                         struct thandle *handle)
3500 {
3501         struct osd_thandle    *oh;
3502
3503         oh = container_of0(handle, struct osd_thandle, ot_super);
3504         LASSERT(oh->ot_handle == NULL);
3505
3506         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3507                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3508
3509         return 0;
3510 }
3511
3512 /**
3513  *      delete a (key, value) pair from index \a dt specified by \a key
3514  *
3515  *      \param  dt      osd index object
3516  *      \param  key     key for index
3517  *      \param  rec     record reference
3518  *      \param  handle  transaction handler
3519  *
3520  *      \retval  0  success
3521  *      \retval -ve   failure
3522  */
3523 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
3524                                 const struct dt_key *key,
3525                                 struct thandle *handle,
3526                                 struct lustre_capa *capa)
3527 {
3528         struct osd_thread_info *oti = osd_oti_get(env);
3529         struct osd_object      *obj = osd_dt_obj(dt);
3530         struct osd_thandle     *oh;
3531         struct iam_path_descr  *ipd;
3532         struct iam_container   *bag = &obj->oo_dir->od_container;
3533         int                     rc;
3534         ENTRY;
3535
3536         LINVRNT(osd_invariant(obj));
3537         LASSERT(dt_object_exists(dt));
3538         LASSERT(!dt_object_remote(dt));
3539         LASSERT(bag->ic_object == obj->oo_inode);
3540         LASSERT(handle != NULL);
3541
3542         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
3543                 RETURN(-EACCES);
3544
3545         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3546
3547         ipd = osd_idx_ipd_get(env, bag);
3548         if (unlikely(ipd == NULL))
3549                 RETURN(-ENOMEM);
3550
3551         oh = container_of0(handle, struct osd_thandle, ot_super);
3552         LASSERT(oh->ot_handle != NULL);
3553         LASSERT(oh->ot_handle->h_transaction != NULL);
3554
3555         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3556                 /* swab quota uid/gid provided by caller */
3557                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3558                 key = (const struct dt_key *)&oti->oti_quota_id;
3559         }
3560
3561         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
3562         osd_ipd_put(env, bag, ipd);
3563         LINVRNT(osd_invariant(obj));
3564         RETURN(rc);
3565 }
3566
3567 static int osd_index_declare_ea_delete(const struct lu_env *env,
3568                                        struct dt_object *dt,
3569                                        const struct dt_key *key,
3570                                        struct thandle *handle)
3571 {
3572         struct osd_thandle *oh;
3573         struct inode       *inode;
3574         int                 rc;
3575         ENTRY;
3576
3577         LASSERT(dt_object_exists(dt));
3578         LASSERT(!dt_object_remote(dt));
3579         LASSERT(handle != NULL);
3580
3581         oh = container_of0(handle, struct osd_thandle, ot_super);
3582         LASSERT(oh->ot_handle == NULL);
3583
3584         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3585                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3586
3587         inode = osd_dt_obj(dt)->oo_inode;
3588         LASSERT(inode);
3589
3590         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3591                                    0, oh, osd_dt_obj(dt), true, NULL, false);
3592         RETURN(rc);
3593 }
3594
3595 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
3596                                           struct dt_rec *fid)
3597 {
3598         struct osd_fid_pack *rec;
3599         int                  rc = -ENODATA;
3600
3601         if (de->file_type & LDISKFS_DIRENT_LUFID) {
3602                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
3603                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
3604         }
3605         return rc;
3606 }
3607
3608 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
3609                           const struct lu_fid *fid)
3610 {
3611         struct seq_server_site  *ss = osd_seq_site(osd);
3612         ENTRY;
3613
3614         /* FID seqs not in FLDB, must be local seq */
3615         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
3616                 RETURN(0);
3617
3618         /* If FLD is not being initialized yet, it only happens during the
3619          * initialization, likely during mgs initialization, and we assume
3620          * this is local FID. */
3621         if (ss == NULL || ss->ss_server_fld == NULL)
3622                 RETURN(0);
3623
3624         /* Only check the local FLDB here */
3625         if (osd_seq_exists(env, osd, fid_seq(fid)))
3626                 RETURN(0);
3627
3628         RETURN(1);
3629 }
3630
3631 /**
3632  * Index delete function for interoperability mode (b11826).
3633  * It will remove the directory entry added by osd_index_ea_insert().
3634  * This entry is needed to maintain name->fid mapping.
3635  *
3636  * \param key,  key i.e. file entry to be deleted
3637  *
3638  * \retval   0, on success
3639  * \retval -ve, on error
3640  */
3641 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
3642                                const struct dt_key *key, struct thandle *handle,
3643                                struct lustre_capa *capa)
3644 {
3645         struct osd_object          *obj = osd_dt_obj(dt);
3646         struct inode               *dir = obj->oo_inode;
3647         struct dentry              *dentry;
3648         struct osd_thandle         *oh;
3649         struct ldiskfs_dir_entry_2 *de = NULL;
3650         struct buffer_head         *bh;
3651         struct htree_lock          *hlock = NULL;
3652         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
3653         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
3654         int                        rc;
3655         ENTRY;
3656
3657         LINVRNT(osd_invariant(obj));
3658         LASSERT(dt_object_exists(dt));
3659         LASSERT(!dt_object_remote(dt));
3660         LASSERT(handle != NULL);
3661
3662         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3663
3664         oh = container_of(handle, struct osd_thandle, ot_super);
3665         LASSERT(oh->ot_handle != NULL);
3666         LASSERT(oh->ot_handle->h_transaction != NULL);